code: function () {
  			var oRouter = UIComponent.getRouterFor(this);
  			if (!this.sNamespace || this.sNamespace === "/") {
  				oRouter.navTo("Layers");
  			} else {
  				var sSplittedNamespace = this.sNamespace.split("/");
  				sSplittedNamespace.splice(-2, 1);
  				var sTargetNamespace = sSplittedNamespace.join("/");
  				oRouter.navTo("LayerContentMaster", {"layer": this.sLayer, "namespace": encodeURIComponent(sTargetNamespace)}, true);
  			}
  		}
docs: Handles the back navigation in the master list;
  Calculates the parent namespace, then navigates to the target.
  @public