Calendar testStart = new GregorianCalendar(1900, 0, 1);
Calendar testEnd = new GregorianCalendar(2200, 0, 1);
List<Entity> entityChanges =  spatialEntitiesModel.getEntity(this.mainController.selectedSpatialEntity.id, testStart.getTime(), testEnd.getTime());
List<Estate> entityChanges =  spatialEntitiesModel.getEstate(this.mainController.selectedSpatialEntity.id, testStart.getTime(), testEnd.getTime());