Custom Vector Source, allows using FeatureCollections.
CustomGeometrySource uses a coalescing model for frequent data updates targeting the same tile id, which means, that the in-progress request as well as the last scheduled request are guaranteed to finish. Any requests scheduled meanwhile can be canceled.
Specification of a data source. For vector and raster sources, either TileJSON or a URL to a TileJSON must be provided. For image and video sources, a URL must be provided. For GeoJSON sources, a URL or inline GeoJSON must be provided.