code: function(sViewId) {
  					var oViewOverlay = OverlayRegistry.getOverlay(sViewId);
  					if (!oViewOverlay) {
  						throw DtUtil.createError("service.ControllerExtension#getTemplate", "no overlay found for the given view ID", "sap.ui.rta");
  					}
  
  					var sControllerExtensionTemplatePath = oViewOverlay.getDesignTimeMetadata().getControllerExtensionTemplate();
  					return makeAjaxCall(sControllerExtensionTemplatePath + "-dbg")
  					.catch(function() {
  						return makeAjaxCall(sControllerExtensionTemplatePath);
  					});
  				}
docs: Gets the Controller Extension template from the DesignTimeMetadata of the given view and returns it as a string wrapped in a promise.
  If there is no template specified, a default template will be returned.
  
  @method sap.ui.rta.service.ControllerExtension.getTemplate
  @param {string} sViewId ID of the view whose template should be retrieved
  @return {Promise} Returns a promise that resolves with the template as string or rejects when the file was not found
  @public