function createAdditionalInfo(oMenuItem) {
		const oAdditionalInfoButton = new Button({
			id: `${this.sId}-${oMenuItem.id}-additionalInfo-button`,
			icon: "sap-icon://message-information",
			visible: !oMenuItem.submenu,
			type: "Transparent",
			ariaLabelledBy: this.getId()
		});
		oAdditionalInfoButton.setTooltip(oMenuItem.additionalInfo);
		return oAdditionalInfoButton;
	}
Additionally to super->deregisterOverlay this method detaches the browser events

@param {sap.ui.dt.Overlay} oOverlay overlay object
@override