PROOF.mtr: def of bend-kit-collections@0.1.4.1
Import: import bend-kit-collections@0.1.4.1/PROOF.bend as PROOF
Lines 647-651 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=647&end_line=651

import Base

def mtr(
  -V: Data, -a: Maybe<&2, V>, -b: Maybe<&2, V>, -c: Maybe<&2, V>,
  e1: {a == b : Maybe<&2, V>}, e2: {b == c : Maybe<&2, V>}
) -> {a == c : Maybe<&2, V>}:
  Equal.trans(Maybe<&2, V>, a, b, c, e1, e2)

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