Thunk.only: def of bolt@1.27.0.0
Import: import bolt@1.27.0.0/src/rules/suspicious/thunk.bend as Thunk
Lines 143-145 of bolt@1.27.0.0/src/rules/suspicious/thunk.bend: https://jend.leeeet.dev/read.txt?path=bolt@1.27.0.0/src/rules/suspicious/thunk.bend&start_line=143&end_line=145

import Base
import bolt@1.27.0.0/src/syntax/tree.bend as Tree

# is a group with this open and these kids a call given exactly one lambda?
def only(+oo: String, +kids: Tree.Node) -> Bool:
  Bool.and(String.eq(oo, "("), Nat.is_eq(lams(kids, False{}), 1n))

Uses (7):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_eq
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String.eq
  https://jend.leeeet.dev/definition.txt?path=bolt@1.27.0.0/src/rules/suspicious/thunk.bend&name=lams
  https://jend.leeeet.dev/definition.txt?path=bolt@1.27.0.0/src/syntax/tree.bend&name=Node