List.map: def of Base
Import: import Base
Lines 918-923 of Base/base.bend: https://jend.leeeet.dev/read.txt?path=Base/base.bend&start_line=918&end_line=923

import Base

def List.map(~A: Type, ~B: Type, ~f: A -> B, xs: List<A>) -> List<B>:
  match xs:
    case Nil{}:
      Nil{}
    case h <> t:
      f(h) <> List.map(~A, ~B, ~f, t)

Uses (1):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List