Random.shuffle: def of bend-kit-random@0.1.0.1
Import: import bend-kit-random@0.1.0.1/random.bend as Random
Lines 142-149 of bend-kit-random@0.1.0.1/random.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-random@0.1.0.1/random.bend&start_line=142&end_line=149

import Base

# A uniform permutation of xs. Every draw is below(i + 1), so a list of n
# items uses n - 1 draws.
def shuffle(~T: Data, xs: List<&2, T>, r: Rng) -> List<&2, T> & Rng:
  match xs:
    case Nil{}:
      (Nil{}, r)
    case Con{+h, t}:
      shuffle.run(~T, h, h <> t, r)

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=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Sigma
  https://jend.leeeet.dev/definition.txt?path=bend-kit-random@0.1.0.1/random.bend&name=Rng
  https://jend.leeeet.dev/definition.txt?path=bend-kit-random@0.1.0.1/random.bend&name=shuffle.run