Poly.len: def of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/poly1305/poly.bend as Poly
Lines 22-23 of bend-collections-laws-crypto@1.0.0.0/proofs/crypto/poly1305/poly.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/crypto/poly1305/poly.bend&start_line=22&end_line=23

import Base

def len(+bs: List<&2, List<&2, U32>>) -> Nat:
  List.length(&2, List<&2, U32>, bs)

Uses (4):
  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=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32