Plan.has.step: def of ezx@1.11.0.0
Import: import ezx@1.11.0.0/src/doctor/plan.bend as Plan
Lines 257-265 of ezx@1.11.0.0/src/doctor/plan.bend: https://jend.leeeet.dev/read.txt?path=ezx@1.11.0.0/src/doctor/plan.bend&start_line=257&end_line=265

import Base

# the rest of a scan only when this one was not it. `Bool.or` reduces both
# of its sides, so a scan written with it reads the whole list even when the
# first entry answers. The rest arrives as a thunk.
def has.step(here: Bool, rest: Unit -> Bool) -> Bool:
  match here:
    case True{}:
      True{}
    case False{}:
      rest(Unit{})

Uses (2):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Unit