Make this more advanced if many extensions need this (although we should try to ...

Created by: todo[bot]

https://github.com/sourcegraph/sourcegraph/blob/874707c9d9065f7bb68b02cb91f42dbbdfbb7792/shared/src/api/client/context/contextService.ts#L35-L40

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This issue was generated by todo based on a TODO comment in 874707c9d9065f7bb68b02cb91f42dbbdfbb7792 when #4025 was merged. cc @sourcegraph.