These may just work by borrowing the data.frame methods in dplyr

Reporter: Neal Richardson / @nealrichardson
Assignee: Nicola Crane / @thisisnic

Related issues:

• [R] Bindings for count aggregation (is blocked by)

PRs and other links:

• GitHub Pull Request #11306

_{Note: This issue was originally created as ARROW-13739. Please see the migration documentation for further details.}