code: function()
  	{
  		if(!this._initialized)
  		{
  			return;
  		}
  		
  		if(this._dataSource !== null)
  		{
  			if(this._pollingID !== null)
  			{
  				this._dataSource.clearInterval(this._pollingID);
  				this._pollingID = null;
  			}
  			
  			if(this._pollingInterval > 0)
  			{
  				this._pollingID = this._dataSource.setInterval(this._pollingInterval, this._request, this._loadDataHandler, this);
  			}
  			this._dataSource.sendRequest(this._request, this._loadDataHandler, this);
  		}
  	}
docs: Sends (or resends) the request to the DataSource.
  
  @method refreshData