fnGetControlFor = function(obj) {
		if (obj.id && Element.getElementById(obj.id)) {
			return Element.getElementById(obj.id);
		}
	}
Returns the sap.ui.core.Element instance for an arbitrary HTML Element, or undefined, if the HTML element is not a sap.ui.core.Element

@param obj
@returns {sap.ui.core.Element|undefined}
@private