function _updateSelectionStateInDOM() {
		var $This = this.$(),
			bToggleEnabled = this.getToggleEnabled(),
			bSelected = this.getSelected();

		if (!$This.length) {
			return;
		}

		if (bToggleEnabled) {
			$This.toggleClass("sapUiUfdShellHeadItmSel", bSelected);
			$This.attr("aria-pressed", bSelected);
		} else {
			$This.removeClass("sapUiUfdShellHeadItmSel");
			$This.removeAttr("aria-pressed");
		}
	}
Event is fired when the user presses the item.