PROOF.sfrom: def of bend-kit-collections@0.1.4.1
Import: import bend-kit-collections@0.1.4.1/PROOF.bend as PROOF
Lines 140-146 of bend-kit-collections@0.1.4.1/PROOF.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-collections@0.1.4.1/PROOF.bend&start_line=140&end_line=146

import Base
import bend-kit-collections@0.1.4.1/LAWS.bend as Laws

# The list is sorted and its first element lies above lb.
def sfrom(~K: Data, ~cmp: K -> K -> Cmp, lb: Maybe<&2, K>, xs: List<&2, K>) -> Bool:
  match lb:
    case None{}:
      Laws.sorted(~K, ~cmp, xs)
    case Some{b}:
      Laws.sorted.go(~K, ~cmp, xs, b)

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Cmp
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=bend-kit-collections@0.1.4.1/LAWS.bend&name=sorted
  https://jend.leeeet.dev/definition.txt?path=bend-kit-collections@0.1.4.1/LAWS.bend&name=sorted.go