code: function (oEvent) {
  			var oDownloadDialog = this.byId("downloadDialog");
  			this._oDownloadButton = oEvent.getSource();
  
  			oDownloadDialog.getBinding("items").filter([]);
  			oDownloadDialog.open();
  			// hack: override of the SelectDialog's internal dialog height
  			oDownloadDialog._oDialog.setContentHeight("");
  		}
docs: /* =========================================================== /* event handlers /* =========================================================== 
  Opens the download dialog
  @param {sap.ui.base.Event} oEvent the Button press event
  @public