listAllAppVariants(mPropertyBag) {
			if (!mPropertyBag.layer) {
				return Promise.reject("Layer must be provided");
			}
			return _callAppVariantFunction("list", mPropertyBag);
		}
Lists all the app variants based on the reference application
@param {object} mPropertyBag - Object with parameters as properties
@param {sap.ui.fl.Selector} mPropertyBag.selector - Selector
@param {sap.ui.fl.Layer} mPropertyBag.layer - Connectors are now determined based on the layer
@returns {Promise} Promise that resolves with the list of app variant entries

@private
@ui5-restricted