Natural.sum: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/src/math/natural.bend as Natural
Lines 100-101 of bend-collections@1.0.0.0/src/math/natural.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/src/math/natural.bend&start_line=100&end_line=101

import Base

def sum(xs: List<&2, Nat>) -> Nat:
  sum_go(xs, 0n)

Uses (3):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/math/natural.bend&name=sum_go