List.drop_nil: law of bend-mathlib@0.8.1.0
Import: import bend-mathlib@0.8.1.0/list.bend as List
Lines 267-272 of bend-mathlib@0.8.1.0/list.bend: https://jend.leeeet.dev/read.txt?path=bend-mathlib@0.8.1.0/list.bend&start_line=267&end_line=272

import Base

# Dropping from the empty list gives the empty list.
law drop_nil:
  for -a: Quant
  for -A: Kind(a)
  for -n: Nat
  {List.drop(a, A, Nil{}, n) == Nil{} : List<a, A>}

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=List.drop
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat