getFlexInfo(/* mPropertyBag */) {
			return Promise.resolve({});
		}
Interface to retrieve the flexibility info for a given application and layer.
The flexibility info is a JSON string that has boolean properties 'isPublishEnabled' and 'isResetEnabled'
that indicate if for the given application and layer a publish and reset shall be enabled, respectively

@param {object} mPropertyBag Property bag
@param {sap.ui.fl.Layer} mPropertyBag.layer Layer
@param {string} mPropertyBag.reference Flex reference
@param {string} [mPropertyBag.url] Configured url for the connector
@returns {Promise<object>} Promise resolves as soon as the writing was completed