IO: def of Base
Import: import Base
Lines 162-165 of Base/base.bend: https://jend.leeeet.dev/read.txt?path=Base/base.bend&start_line=162&end_line=165

import Base

def IO(-A: Type) -> Type:
  @-R: Type ->
  @k: (A -> IO.OP<R>) ->
  IO.OP<R>

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