yeet

node_modules/react-native/Libraries/polyfills/Object.es7.js

@@ -0,0 +1,58 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ * @polyfill
+ * @nolint
+ */
+
+(function() {
+  'use strict';
+
+  const hasOwnProperty = Object.prototype.hasOwnProperty;
+
+  /**
+   * Returns an array of the given object's own enumerable entries.
+   * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/entries
+   */
+  if (typeof Object.entries !== 'function') {
+    Object.entries = function(object) {
+      // `null` and `undefined` values are not allowed.
+      if (object == null) {
+        throw new TypeError('Object.entries called on non-object');
+      }
+
+      const entries = [];
+      for (const key in object) {
+        if (hasOwnProperty.call(object, key)) {
+          entries.push([key, object[key]]);
+        }
+      }
+      return entries;
+    };
+  }
+
+  /**
+   * Returns an array of the given object's own enumerable entries.
+   * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/values
+   */
+  if (typeof Object.values !== 'function') {
+    Object.values = function(object) {
+      // `null` and `undefined` values are not allowed.
+      if (object == null) {
+        throw new TypeError('Object.values called on non-object');
+      }
+
+      const values = [];
+      for (const key in object) {
+        if (hasOwnProperty.call(object, key)) {
+          values.push(object[key]);
+        }
+      }
+      return values;
+    };
+  }
+})();

node_modules/react-native/Libraries/polyfills/console.js

@@ -0,0 +1,641 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @polyfill
+ * @nolint
+ * @format
+ */
+
+/* eslint-disable no-shadow, eqeqeq, curly, no-unused-vars, no-void, no-control-regex  */
+
+/**
+ * This pipes all of our console logging functions to native logging so that
+ * JavaScript errors in required modules show up in Xcode via NSLog.
+ */
+const inspect = (function() {
+  // Copyright Joyent, Inc. and other Node contributors.
+  //
+  // Permission is hereby granted, free of charge, to any person obtaining a
+  // copy of this software and associated documentation files (the
+  // "Software"), to deal in the Software without restriction, including
+  // without limitation the rights to use, copy, modify, merge, publish,
+  // distribute, sublicense, and/or sell copies of the Software, and to permit
+  // persons to whom the Software is furnished to do so, subject to the
+  // following conditions:
+  //
+  // The above copyright notice and this permission notice shall be included
+  // in all copies or substantial portions of the Software.
+  //
+  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+  // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+  // USE OR OTHER DEALINGS IN THE SOFTWARE.
+  //
+  // https://github.com/joyent/node/blob/master/lib/util.js
+
+  function inspect(obj, opts) {
+    var ctx = {
+      seen: [],
+      formatValueCalls: 0,
+      stylize: stylizeNoColor,
+    };
+    return formatValue(ctx, obj, opts.depth);
+  }
+
+  function stylizeNoColor(str, styleType) {
+    return str;
+  }
+
+  function arrayToHash(array) {
+    var hash = {};
+
+    array.forEach(function(val, idx) {
+      hash[val] = true;
+    });
+
+    return hash;
+  }
+
+  function formatValue(ctx, value, recurseTimes) {
+    ctx.formatValueCalls++;
+    if (ctx.formatValueCalls > 200) {
+      return `[TOO BIG formatValueCalls ${
+        ctx.formatValueCalls
+      } exceeded limit of 200]`;
+    }
+
+    // Primitive types cannot have properties
+    var primitive = formatPrimitive(ctx, value);
+    if (primitive) {
+      return primitive;
+    }
+
+    // Look up the keys of the object.
+    var keys = Object.keys(value);
+    var visibleKeys = arrayToHash(keys);
+
+    // IE doesn't make error fields non-enumerable
+    // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
+    if (
+      isError(value) &&
+      (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)
+    ) {
+      return formatError(value);
+    }
+
+    // Some type of object without properties can be shortcutted.
+    if (keys.length === 0) {
+      if (isFunction(value)) {
+        var name = value.name ? ': ' + value.name : '';
+        return ctx.stylize('[Function' + name + ']', 'special');
+      }
+      if (isRegExp(value)) {
+        return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
+      }
+      if (isDate(value)) {
+        return ctx.stylize(Date.prototype.toString.call(value), 'date');
+      }
+      if (isError(value)) {
+        return formatError(value);
+      }
+    }
+
+    var base = '',
+      array = false,
+      braces = ['{', '}'];
+
+    // Make Array say that they are Array
+    if (isArray(value)) {
+      array = true;
+      braces = ['[', ']'];
+    }
+
+    // Make functions say that they are functions
+    if (isFunction(value)) {
+      var n = value.name ? ': ' + value.name : '';
+      base = ' [Function' + n + ']';
+    }
+
+    // Make RegExps say that they are RegExps
+    if (isRegExp(value)) {
+      base = ' ' + RegExp.prototype.toString.call(value);
+    }
+
+    // Make dates with properties first say the date
+    if (isDate(value)) {
+      base = ' ' + Date.prototype.toUTCString.call(value);
+    }
+
+    // Make error with message first say the error
+    if (isError(value)) {
+      base = ' ' + formatError(value);
+    }
+
+    if (keys.length === 0 && (!array || value.length == 0)) {
+      return braces[0] + base + braces[1];
+    }
+
+    if (recurseTimes < 0) {
+      if (isRegExp(value)) {
+        return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
+      } else {
+        return ctx.stylize('[Object]', 'special');
+      }
+    }
+
+    ctx.seen.push(value);
+
+    var output;
+    if (array) {
+      output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
+    } else {
+      output = keys.map(function(key) {
+        return formatProperty(
+          ctx,
+          value,
+          recurseTimes,
+          visibleKeys,
+          key,
+          array,
+        );
+      });
+    }
+
+    ctx.seen.pop();
+
+    return reduceToSingleString(output, base, braces);
+  }
+
+  function formatPrimitive(ctx, value) {
+    if (isUndefined(value)) return ctx.stylize('undefined', 'undefined');
+    if (isString(value)) {
+      var simple =
+        "'" +
+        JSON.stringify(value)
+          .replace(/^"|"$/g, '')
+          .replace(/'/g, "\\'")
+          .replace(/\\"/g, '"') +
+        "'";
+      return ctx.stylize(simple, 'string');
+    }
+    if (isNumber(value)) return ctx.stylize('' + value, 'number');
+    if (isBoolean(value)) return ctx.stylize('' + value, 'boolean');
+    // For some reason typeof null is "object", so special case here.
+    if (isNull(value)) return ctx.stylize('null', 'null');
+  }
+
+  function formatError(value) {
+    return '[' + Error.prototype.toString.call(value) + ']';
+  }
+
+  function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
+    var output = [];
+    for (var i = 0, l = value.length; i < l; ++i) {
+      if (hasOwnProperty(value, String(i))) {
+        output.push(
+          formatProperty(
+            ctx,
+            value,
+            recurseTimes,
+            visibleKeys,
+            String(i),
+            true,
+          ),
+        );
+      } else {
+        output.push('');
+      }
+    }
+    keys.forEach(function(key) {
+      if (!key.match(/^\d+$/)) {
+        output.push(
+          formatProperty(ctx, value, recurseTimes, visibleKeys, key, true),
+        );
+      }
+    });
+    return output;
+  }
+
+  function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
+    var name, str, desc;
+    desc = Object.getOwnPropertyDescriptor(value, key) || {value: value[key]};
+    if (desc.get) {
+      if (desc.set) {
+        str = ctx.stylize('[Getter/Setter]', 'special');
+      } else {
+        str = ctx.stylize('[Getter]', 'special');
+      }
+    } else {
+      if (desc.set) {
+        str = ctx.stylize('[Setter]', 'special');
+      }
+    }
+    if (!hasOwnProperty(visibleKeys, key)) {
+      name = '[' + key + ']';
+    }
+    if (!str) {
+      if (ctx.seen.indexOf(desc.value) < 0) {
+        if (isNull(recurseTimes)) {
+          str = formatValue(ctx, desc.value, null);
+        } else {
+          str = formatValue(ctx, desc.value, recurseTimes - 1);
+        }
+        if (str.indexOf('\n') > -1) {
+          if (array) {
+            str = str
+              .split('\n')
+              .map(function(line) {
+                return '  ' + line;
+              })
+              .join('\n')
+              .substr(2);
+          } else {
+            str =
+              '\n' +
+              str
+                .split('\n')
+                .map(function(line) {
+                  return '   ' + line;
+                })
+                .join('\n');
+          }
+        }
+      } else {
+        str = ctx.stylize('[Circular]', 'special');
+      }
+    }
+    if (isUndefined(name)) {
+      if (array && key.match(/^\d+$/)) {
+        return str;
+      }
+      name = JSON.stringify('' + key);
+      if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
+        name = name.substr(1, name.length - 2);
+        name = ctx.stylize(name, 'name');
+      } else {
+        name = name
+          .replace(/'/g, "\\'")
+          .replace(/\\"/g, '"')
+          .replace(/(^"|"$)/g, "'");
+        name = ctx.stylize(name, 'string');
+      }
+    }
+
+    return name + ': ' + str;
+  }
+
+  function reduceToSingleString(output, base, braces) {
+    var numLinesEst = 0;
+    var length = output.reduce(function(prev, cur) {
+      numLinesEst++;
+      if (cur.indexOf('\n') >= 0) numLinesEst++;
+      return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
+    }, 0);
+
+    if (length > 60) {
+      return (
+        braces[0] +
+        (base === '' ? '' : base + '\n ') +
+        ' ' +
+        output.join(',\n  ') +
+        ' ' +
+        braces[1]
+      );
+    }
+
+    return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
+  }
+
+  // NOTE: These type checking functions intentionally don't use `instanceof`
+  // because it is fragile and can be easily faked with `Object.create()`.
+  function isArray(ar) {
+    return Array.isArray(ar);
+  }
+
+  function isBoolean(arg) {
+    return typeof arg === 'boolean';
+  }
+
+  function isNull(arg) {
+    return arg === null;
+  }
+
+  function isNullOrUndefined(arg) {
+    return arg == null;
+  }
+
+  function isNumber(arg) {
+    return typeof arg === 'number';
+  }
+
+  function isString(arg) {
+    return typeof arg === 'string';
+  }
+
+  function isSymbol(arg) {
+    return typeof arg === 'symbol';
+  }
+
+  function isUndefined(arg) {
+    return arg === void 0;
+  }
+
+  function isRegExp(re) {
+    return isObject(re) && objectToString(re) === '[object RegExp]';
+  }
+
+  function isObject(arg) {
+    return typeof arg === 'object' && arg !== null;
+  }
+
+  function isDate(d) {
+    return isObject(d) && objectToString(d) === '[object Date]';
+  }
+
+  function isError(e) {
+    return (
+      isObject(e) &&
+      (objectToString(e) === '[object Error]' || e instanceof Error)
+    );
+  }
+
+  function isFunction(arg) {
+    return typeof arg === 'function';
+  }
+
+  function objectToString(o) {
+    return Object.prototype.toString.call(o);
+  }
+
+  function hasOwnProperty(obj, prop) {
+    return Object.prototype.hasOwnProperty.call(obj, prop);
+  }
+
+  return inspect;
+})();
+
+const OBJECT_COLUMN_NAME = '(index)';
+const LOG_LEVELS = {
+  trace: 0,
+  info: 1,
+  warn: 2,
+  error: 3,
+};
+const INSPECTOR_LEVELS = [];
+INSPECTOR_LEVELS[LOG_LEVELS.trace] = 'debug';
+INSPECTOR_LEVELS[LOG_LEVELS.info] = 'log';
+INSPECTOR_LEVELS[LOG_LEVELS.warn] = 'warning';
+INSPECTOR_LEVELS[LOG_LEVELS.error] = 'error';
+
+// Strip the inner function in getNativeLogFunction(), if in dev also
+// strip method printing to originalConsole.
+const INSPECTOR_FRAMES_TO_SKIP = __DEV__ ? 2 : 1;
+
+function getNativeLogFunction(level) {
+  return function() {
+    let str;
+    if (arguments.length === 1 && typeof arguments[0] === 'string') {
+      str = arguments[0];
+    } else {
+      str = Array.prototype.map
+        .call(arguments, function(arg) {
+          return inspect(arg, {depth: 10});
+        })
+        .join(', ');
+    }
+
+    // TRICKY
+    // If more than one argument is provided, the code above collapses them all
+    // into a single formatted string. This transform wraps string arguments in
+    // single quotes (e.g. "foo" -> "'foo'") which then breaks the "Warning:"
+    // check below. So it's important that we look at the first argument, rather
+    // than the formatted argument string.
+    const firstArg = arguments[0];
+
+    let logLevel = level;
+    if (
+      typeof firstArg === 'string' &&
+      firstArg.slice(0, 9) === 'Warning: ' &&
+      logLevel >= LOG_LEVELS.error
+    ) {
+      // React warnings use console.error so that a stack trace is shown,
+      // but we don't (currently) want these to show a redbox
+      // (Note: Logic duplicated in ExceptionsManager.js.)
+      logLevel = LOG_LEVELS.warn;
+    }
+    if (global.__inspectorLog) {
+      global.__inspectorLog(
+        INSPECTOR_LEVELS[logLevel],
+        str,
+        [].slice.call(arguments),
+        INSPECTOR_FRAMES_TO_SKIP,
+      );
+    }
+    if (groupStack.length) {
+      str = groupFormat('', str);
+    }
+    global.nativeLoggingHook(str, logLevel);
+  };
+}
+
+function repeat(element, n) {
+  return Array.apply(null, Array(n)).map(function() {
+    return element;
+  });
+}
+
+function consoleTablePolyfill(rows) {
+  // convert object -> array
+  if (!Array.isArray(rows)) {
+    var data = rows;
+    rows = [];
+    for (var key in data) {
+      if (data.hasOwnProperty(key)) {
+        var row = data[key];
+        row[OBJECT_COLUMN_NAME] = key;
+        rows.push(row);
+      }
+    }
+  }
+  if (rows.length === 0) {
+    global.nativeLoggingHook('', LOG_LEVELS.info);
+    return;
+  }
+
+  var columns = Object.keys(rows[0]).sort();
+  var stringRows = [];
+  var columnWidths = [];
+
+  // Convert each cell to a string. Also
+  // figure out max cell width for each column
+  columns.forEach(function(k, i) {
+    columnWidths[i] = k.length;
+    for (var j = 0; j < rows.length; j++) {
+      var cellStr = (rows[j][k] || '?').toString();
+      stringRows[j] = stringRows[j] || [];
+      stringRows[j][i] = cellStr;
+      columnWidths[i] = Math.max(columnWidths[i], cellStr.length);
+    }
+  });
+
+  // Join all elements in the row into a single string with | separators
+  // (appends extra spaces to each cell to make separators  | aligned)
+  function joinRow(row, space) {
+    var cells = row.map(function(cell, i) {
+      var extraSpaces = repeat(' ', columnWidths[i] - cell.length).join('');
+      return cell + extraSpaces;
+    });
+    space = space || ' ';
+    return cells.join(space + '|' + space);
+  }
+
+  var separators = columnWidths.map(function(columnWidth) {
+    return repeat('-', columnWidth).join('');
+  });
+  var separatorRow = joinRow(separators, '-');
+  var header = joinRow(columns);
+  var table = [header, separatorRow];
+
+  for (var i = 0; i < rows.length; i++) {
+    table.push(joinRow(stringRows[i]));
+  }
+
+  // Notice extra empty line at the beginning.
+  // Native logging hook adds "RCTLog >" at the front of every
+  // logged string, which would shift the header and screw up
+  // the table
+  global.nativeLoggingHook('\n' + table.join('\n'), LOG_LEVELS.info);
+}
+
+const GROUP_PAD = '\u2502'; // Box light vertical
+const GROUP_OPEN = '\u2510'; // Box light down+left
+const GROUP_CLOSE = '\u2518'; // Box light up+left
+
+const groupStack = [];
+
+function groupFormat(prefix, msg) {
+  // Insert group formatting before the console message
+  return groupStack.join('') + prefix + ' ' + (msg || '');
+}
+
+function consoleGroupPolyfill(label) {
+  global.nativeLoggingHook(groupFormat(GROUP_OPEN, label), LOG_LEVELS.info);
+  groupStack.push(GROUP_PAD);
+}
+
+function consoleGroupCollapsedPolyfill(label) {
+  global.nativeLoggingHook(groupFormat(GROUP_CLOSE, label), LOG_LEVELS.info);
+  groupStack.push(GROUP_PAD);
+}
+
+function consoleGroupEndPolyfill() {
+  groupStack.pop();
+  global.nativeLoggingHook(groupFormat(GROUP_CLOSE), LOG_LEVELS.info);
+}
+
+function consoleAssertPolyfill(expression, label) {
+  if (!expression) {
+    global.nativeLoggingHook('Assertion failed: ' + label, LOG_LEVELS.error);
+  }
+}
+
+if (global.nativeLoggingHook) {
+  const originalConsole = global.console;
+  // Preserve the original `console` as `originalConsole`
+  if (__DEV__ && originalConsole) {
+    const descriptor = Object.getOwnPropertyDescriptor(global, 'console');
+    if (descriptor) {
+      Object.defineProperty(global, 'originalConsole', descriptor);
+    }
+  }
+
+  global.console = {
+    error: getNativeLogFunction(LOG_LEVELS.error),
+    info: getNativeLogFunction(LOG_LEVELS.info),
+    log: getNativeLogFunction(LOG_LEVELS.info),
+    warn: getNativeLogFunction(LOG_LEVELS.warn),
+    trace: getNativeLogFunction(LOG_LEVELS.trace),
+    debug: getNativeLogFunction(LOG_LEVELS.trace),
+    table: consoleTablePolyfill,
+    group: consoleGroupPolyfill,
+    groupEnd: consoleGroupEndPolyfill,
+    groupCollapsed: consoleGroupCollapsedPolyfill,
+    assert: consoleAssertPolyfill,
+  };
+
+  Object.defineProperty(console, '_isPolyfilled', {
+    value: true,
+    enumerable: false,
+  });
+
+  // If available, also call the original `console` method since that is
+  // sometimes useful. Ex: on OS X, this will let you see rich output in
+  // the Safari Web Inspector console.
+  if (__DEV__ && originalConsole) {
+    Object.keys(console).forEach(methodName => {
+      const reactNativeMethod = console[methodName];
+      if (originalConsole[methodName]) {
+        console[methodName] = function() {
+          // TODO(T43930203): remove this special case once originalConsole.assert properly checks
+          // the condition
+          if (methodName === 'assert') {
+            if (!arguments[0]) {
+              originalConsole.assert(...arguments);
+            }
+          } else {
+            originalConsole[methodName](...arguments);
+          }
+          reactNativeMethod.apply(console, arguments);
+        };
+      }
+    });
+
+    // The following methods are not supported by this polyfill but
+    // we still should pass them to original console if they are
+    // supported by it.
+    ['clear', 'dir', 'dirxml', 'profile', 'profileEnd'].forEach(methodName => {
+      if (typeof originalConsole[methodName] === 'function') {
+        console[methodName] = function() {
+          originalConsole[methodName](...arguments);
+        };
+      }
+    });
+  }
+} else if (!global.console) {
+  function stub() {}
+  const log = global.print || stub;
+
+  global.console = {
+    debug: log,
+    error: log,
+    info: log,
+    log: log,
+    trace: log,
+    warn: log,
+    assert(expression, label) {
+      if (!expression) {
+        log('Assertion failed: ' + label);
+      }
+    },
+    clear: stub,
+    dir: stub,
+    dirxml: stub,
+    group: stub,
+    groupCollapsed: stub,
+    groupEnd: stub,
+    profile: stub,
+    profileEnd: stub,
+    table: stub,
+  };
+
+  Object.defineProperty(console, '_isPolyfilled', {
+    value: true,
+    enumerable: false,
+  });
+}

node_modules/react-native/Libraries/polyfills/error-guard.js

@@ -0,0 +1,115 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ * @flow strict
+ * @polyfill
+ */
+
+let _inGuard = 0;
+
+type ErrorHandler = (error: mixed, isFatal: boolean) => void;
+type Fn<Args, Return> = (...Args) => Return;
+
+/**
+ * This is the error handler that is called when we encounter an exception
+ * when loading a module. This will report any errors encountered before
+ * ExceptionsManager is configured.
+ */
+let _globalHandler: ErrorHandler = function onError(
+  e: mixed,
+  isFatal: boolean,
+) {
+  throw e;
+};
+
+/**
+ * The particular require runtime that we are using looks for a global
+ * `ErrorUtils` object and if it exists, then it requires modules with the
+ * error handler specified via ErrorUtils.setGlobalHandler by calling the
+ * require function with applyWithGuard. Since the require module is loaded
+ * before any of the modules, this ErrorUtils must be defined (and the handler
+ * set) globally before requiring anything.
+ */
+const ErrorUtils = {
+  setGlobalHandler(fun: ErrorHandler): void {
+    _globalHandler = fun;
+  },
+  getGlobalHandler(): ErrorHandler {
+    return _globalHandler;
+  },
+  reportError(error: mixed): void {
+    _globalHandler && _globalHandler(error, false);
+  },
+  reportFatalError(error: mixed): void {
+    // NOTE: This has an untyped call site in Metro.
+    _globalHandler && _globalHandler(error, true);
+  },
+  applyWithGuard<TArgs: $ReadOnlyArray<mixed>, TOut>(
+    fun: Fn<TArgs, TOut>,
+    context?: ?mixed,
+    args?: ?TArgs,
+    // Unused, but some code synced from www sets it to null.
+    unused_onError?: null,
+    // Some callers pass a name here, which we ignore.
+    unused_name?: ?string,
+  ): ?TOut {
+    try {
+      _inGuard++;
+      // $FlowFixMe: TODO T48204745 (1) apply(context, null) is fine. (2) array -> rest array should work
+      return fun.apply(context, args);
+    } catch (e) {
+      ErrorUtils.reportError(e);
+    } finally {
+      _inGuard--;
+    }
+    return null;
+  },
+  applyWithGuardIfNeeded<TArgs: $ReadOnlyArray<mixed>, TOut>(
+    fun: Fn<TArgs, TOut>,
+    context?: ?mixed,
+    args?: ?TArgs,
+  ): ?TOut {
+    if (ErrorUtils.inGuard()) {
+      // $FlowFixMe: TODO T48204745 (1) apply(context, null) is fine. (2) array -> rest array should work
+      return fun.apply(context, args);
+    } else {
+      ErrorUtils.applyWithGuard(fun, context, args);
+    }
+    return null;
+  },
+  inGuard(): boolean {
+    return !!_inGuard;
+  },
+  guard<TArgs: $ReadOnlyArray<mixed>, TOut>(
+    fun: Fn<TArgs, TOut>,
+    name?: ?string,
+    context?: ?mixed,
+  ): ?(...TArgs) => ?TOut {
+    // TODO: (moti) T48204753 Make sure this warning is never hit and remove it - types
+    // should be sufficient.
+    if (typeof fun !== 'function') {
+      console.warn('A function must be passed to ErrorUtils.guard, got ', fun);
+      return null;
+    }
+    const guardName = name ?? fun.name ?? '<generated guard>';
+    function guarded(...args: TArgs): ?TOut {
+      return ErrorUtils.applyWithGuard(
+        fun,
+        context ?? this,
+        args,
+        null,
+        guardName,
+      );
+    }
+
+    return guarded;
+  },
+};
+
+global.ErrorUtils = ErrorUtils;
+
+export type ErrorUtilsT = typeof ErrorUtils;