function writeChangesToBackend(mPropertyBag, aFlexObjects) {
		return Storage.write({
			layer: mPropertyBag.layer,
			flexObjects: aFlexObjects,
			transport: "",
			isLegacyVariant: false,
			parentVersion: getParentVersion(mPropertyBag)
		});
	}
Write changes to backend
@param {object} mPropertyBag - Object with parameters as properties
@param {string} mPropertyBag.parentVersion - Indicates if changes should be written as a draft and on which version the changes should be based on
@param {string} mPropertyBag.layer - Target Layer
@param {sap.ui.fl.apply._internal.flexObjects.FlexObject[]} aFlexObjects - Array containing FlexObjects
@returns {Promise} Returns a promise that resolves as soon as the writing was completed or rejects in case of an error