save(mPropertyBag) {
			return setReferenceAndPersistencyKeyInPropertyBagAndCallFunction(mPropertyBag, CompVariantState.persist);
		}
Saves/flushes all current changes to the back end.

@param {object} mPropertyBag - Object with parameters as properties
@param {sap.ui.comp.smartvariants.SmartVariantManagement|
			sap.ui.comp.smartfilterbar.SmartFilterBar|
			sap.ui.comp.smarttable.SmartTable|
			sap.ui.comp.smartchart.SmartChart} mPropertyBag.control - Variant management control for which the flex objects should be saved
@returns {Promise<object[]>} Promise that resolves with an array of responses or is rejected with the first error
@private
@ui5-restricted sap.ui.comp.smartvariant.SmartVariantManagement