code: function (fullName, options) {
        _emberMetalDebug.assert('fullName must be a proper full name', this.registry.validateFullName(fullName));
        return factoryFor(this, this.registry.normalize(fullName), options);
      }
docs: Given a fullName, return the corresponding factory.
  @private
  @method lookupFactory
  @param {String} fullName
  @param {Object} [options]
  @param {String} [options.source] The fullname of the request source (used for local lookup)
  @return {any}