Maybe.maybe_bind_assoc_sym: law of bend-mathlib@0.8.1.0
Import: import bend-mathlib@0.8.1.0/maybe.bend as Maybe
Lines 245-253 of bend-mathlib@0.8.1.0/maybe.bend: https://jend.leeeet.dev/read.txt?path=bend-mathlib@0.8.1.0/maybe.bend&start_line=245&end_line=253

import Base

# Bind is associative, reversed to rewrite toward the simple side.
law maybe_bind_assoc_sym:
  for ~A: Data
  for ~B: Data
  for ~C: Data
  for -f: A -> Maybe<&2, B>
  for -g: B -> Maybe<&2, C>
  for m: Maybe<&2, A>
  {Maybe.bind(&2, A, C, m, x => Maybe.bind(&2, B, C, f(x), g)) == Maybe.bind(&2, B, C, Maybe.bind(&2, A, B, m, f), g) : Maybe<&2, C>}

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Equal.sym
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe.bind
  https://jend.leeeet.dev/definition.txt?path=bend-mathlib@0.8.1.0/maybe.bend&name=maybe_bind_assoc