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define([], function() {
  /** Used as a safe reference for `undefined` in pre-ES5 environments. */  var undefined;
  /**   * The base implementation of `_.propertyOf` without support for deep paths.   *   * @private   * @param {Object} object The object to query.   * @returns {Function} Returns the new accessor function.   */  function basePropertyOf(object) {    return function(key) {      return object == null ? undefined : object[key];    };  }
  return basePropertyOf;});