condense(/* mPropertyBag */) {
			return Promise.reject("condense is not implemented");
		}
Interface called to write new flex data; This method is called with a list of entities like changes, variants,
control variants, variant changes and variant management changes.

@param {object} mPropertyBag Property bag
@param {object[]} mPropertyBag.flexObjects Map of condensed changes
@param {sap.ui.fl.Layer} mPropertyBag.layer Layer in which the data should be stored
@param {string} mPropertyBag.reference Flex reference of the application
@param {string} [mPropertyBag.transport] The transport ID
@param {boolean} [mPropertyBag.isLegacyVariant] Whether the new flex data has file type .variant or not
@param {string} [mPropertyBag.url] Configured url for the connector
@param {boolean} [mPropertyBag.draft=false] - Indicates if changes should be written as a draft
@returns {Promise} Resolves as soon as the writing is completed without data