getPropertyInfo(mPropertyBag) {
			return Promise.resolve().then(function() {
				return _getODataPropertiesOfModel(mPropertyBag.element, mPropertyBag.aggregationName, mPropertyBag.payload);
			});
		}
@param {object} mPropertyBag Object with parameters as properties
@param {string} mPropertyBag.element Element instance the delegate is attached to
@param {string} mPropertyBag.aggregationName Name of the aggregation the delegate should provide additional elements
@param {object} mPropertyBag.payload Payload parameter attached to the delegate, empty object if no payload was assigned
@returns {Promise<sap.ui.fl.delegate.PropertyInfo[]>} Metadata in a deep structure of nodes and properties