Myers.trim_first.step: def of bend-edit-distance@0.2.2.0
Import: import bend-edit-distance@0.2.2.0/src/Myers.bend as Myers
Lines 270-276 of bend-edit-distance@0.2.2.0/src/Myers.bend: https://jend.leeeet.dev/read.txt?path=bend-edit-distance@0.2.2.0/src/Myers.bend&start_line=270&end_line=276

import Base

def trim_first.step(entry: BandEntry, tail: List<&2, BandEntry>, rest: List<&2, Peq>,
                    first: Nat, keep: Bool, next: Unit -> Band) -> Band:
  match keep:
    case True{}:
      Band{first, entry <> tail, rest}
    case False{}:
      next(Unit{})

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=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Unit
  https://jend.leeeet.dev/definition.txt?path=bend-edit-distance@0.2.2.0/src/Myers.bend&name=Band
  https://jend.leeeet.dev/definition.txt?path=bend-edit-distance@0.2.2.0/src/Myers.bend&name=BandEntry
  https://jend.leeeet.dev/definition.txt?path=bend-edit-distance@0.2.2.0/src/Myers.bend&name=Peq