val timeExtent: StateFlow<TimeExtent?>

The current TimeExtent of the GeoView. The Time Extent of the GeoView defines how time-enabled data is displayed. Participating layers filter their data to only show data within the time extent set on the GeoView (see TimeAware for details). The range of the time extent includes the start and end values (a feature at 10/24/2016 would be included in a time extent defined as 10/24/2016 - 11/14/2016). Time filtering is not enabled until a non-null time extent is set on the GeoView. When the time extent is null on the GeoView, no time filtering is applied and all content is rendered.