Minor: improve GroupsAccumulator and Accumulator documentation #8963
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Which issue does this PR close?
Part of #7013
Rationale for this change
We recently made
GroupsAccumulator
part of the public API in #8892 (thank you @guojidan ❤️ ). Now that it is public it would be nice to have some additional user facing documentation / rationaleWhat changes are included in this PR?
Update docstrings with explanation of the difference between
Accumulator
andGroupsAccumulator
Are these changes tested?
Existing tests
Are there any user-facing changes?
Doc only