Class
The LocationChangeMessage uses the widget's id widgetId , the MessageType LOCATION_CHANGE message,
the location point . This message is used when a widget needs to announce its changes on location to other widgets.
For example: Map widget publishes this message when user click on the map.
Note: When user clicks on features, the map widget publishes both LocationChangeMessage and DataRecordsSelectionChangeMessage.
If use does not click on feature, the map widget publishes the LocationChangeMessage only.