Vertex group support for particles?

Is there plans to support vertex groups for particle placement? Or is there some other way to determine where particles is placed other than vertex group? I always create a vertex group and use it in the density option.

The issue names no files, tests, or entry points. Start by locating the Blender particle-placement integration and checking how density is currently sourced; done would require a decided approach for vertex-group support or an explicitly documented alternative, along with tests or a reproducible example.

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