Backward.lookup: def of bendtorch-core@0.1.0.0
Import: import bendtorch-core@0.1.0.0/src/autograd/backward.bend as Backward
Lines 78-79 of bendtorch-core@0.1.0.0/src/autograd/backward.bend: https://jend.leeeet.dev/read.txt?path=bendtorch-core@0.1.0.0/src/autograd/backward.bend&start_line=78&end_line=79

import Base

def lookup(-A: Data, +xs: List<&2, A>, +id: Nat) -> Maybe<&2, A>:
  find(A, xs, List.length(&2, A, xs), id)

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.length
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/autograd/backward.bend&name=find