Plan.uniq: def of bolt@1.27.0.0
Import: import bolt@1.27.0.0/src/lint/plan.bend as Plan
Lines 214-222 of bolt@1.27.0.0/src/lint/plan.bend: https://jend.leeeet.dev/read.txt?path=bolt@1.27.0.0/src/lint/plan.bend&start_line=214&end_line=222

import Base

# each path once, where it first appears
def uniq(ps: List<&2, String>, +seen: List<&2, String>) -> List<&2, String>:
  match ps:
    case Nil{}:
      Nil{}
    case Con{+p, rest}:
      +dup = seen.has(seen, p)
      +more = uniq(rest, p <> seen)
      Bool.pick(List<&2, String>, dup, more, p <> more)

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.pick
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=bolt@1.27.0.0/src/lint/plan.bend&name=seen.has