Names.Group.add: def of bend-lint-api@0.2.0.0
Import: import bend-lint-api@0.2.0.0/shared/names.bend as Names
Lines 52-54 of bend-lint-api@0.2.0.0/shared/names.bend: https://jend.leeeet.dev/read.txt?path=bend-lint-api@0.2.0.0/shared/names.bend&start_line=52&end_line=54

import Base

# `groups` with `x` added under `key`. A key's list is last first; `Group.get` gives it in order.
def Group.add(-A: Data, groups: Map<&2, List<&2, A>>, +key: String, x: A) -> Map<&2, List<&2, A>>:
  Group.add.of(A, Map.get(List<&2, A>, [], groups, key), key, x)

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Map
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Map.get
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=bend-lint-api@0.2.0.0/shared/names.bend&name=Group.add.of