function liftChildNodes(oParent, oWithControl, oTarget = oParent) {
				return visitChildNodes(oParent, oWithControl).then(function () {
					var oChild;

					while ((oChild = oParent.firstChild)) {
						oTarget.parentNode.insertBefore(oChild, oTarget);
					}
				});
			}
Visits the child nodes of the given parent element. Lifts them up by inserting them
before the target element.

@param {Element} oParent the XML DOM DOM element
@param {sap.ui.core.util._with} oWithControl the "with" control
@param {Element} [oTarget=oParent] the target DOM element
@returns {sap.ui.base.SyncPromise}
  A sync promise which resolves with <code>undefined</code> as soon as visiting and
  lifting is done, or is rejected with a corresponding error if visiting fails.