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define([], function() {
  /** Used as a safe reference for `undefined` in pre-ES5 environments. */  var undefined;
  /**   * A specialized version of `matchesProperty` for source values suitable   * for strict equality comparisons, i.e. `===`.   *   * @private   * @param {string} key The key of the property to get.   * @param {*} srcValue The value to match.   * @returns {Function} Returns the new spec function.   */  function matchesStrictComparable(key, srcValue) {    return function(object) {      if (object == null) {        return false;      }      return object[key] === srcValue &&        (srcValue !== undefined || (key in Object(object)));    };  }
  return matchesStrictComparable;});