code: function(height, activateCallback, deactivateCallback, startCallback) {
  
  			var self = this;
  
  			self.__refreshHeight = height;
  			self.__refreshActivate = activateCallback;
  			self.__refreshDeactivate = deactivateCallback;
  			self.__refreshStart = startCallback;
  
  		}
docs: Activates pull-to-refresh. A special zone on the top of the list to start a list refresh whenever
  the user event is released during visibility of this zone. This was introduced by some apps on iOS like
  the official Twitter client.
  
  @param {Integer} height Height of pull-to-refresh zone on top of rendered list
  @param {Function} activateCallback Callback to execute on activation. This is for signalling the user about a refresh is about to happen when he release.
  @param {Function} deactivateCallback Callback to execute on deactivation. This is for signalling the user about the refresh being cancelled.
  @param {Function} Callback to execute to start the real async refresh action. Call {@link #finishPullToRefresh} startCallback after finish of refresh.