function onModelContextChange(oEvent, oData) {
		var oChart = oEvent.getSource();
		var oModel = this._getModel(oChart);

		if (oModel) {
			oChart.detachModelContextChange(onModelContextChange);
			oData.resolver(oModel);
		}
	}
This methods is called during the appliance of the add condition change.
This intention is to update the propertyInfo property.

@param {sap.ui.mdc.FilterBar} oFilterBar - the instance of filter bar
@param {string} sPropertyName The name of a property.
@param {Object} mPropertyBag Instance of property bag from Flex change API
@returns {Promise} Promise that resolves once the properyInfo property was updated