Spin.owed: def of ezx@1.11.0.0
Import: import ezx@1.11.0.0/src/share/spin.bend as Spin
Lines 50-57 of ezx@1.11.0.0/src/share/spin.bend: https://jend.leeeet.dev/read.txt?path=ezx@1.11.0.0/src/share/spin.bend&start_line=50&end_line=57

import Base

# a spinner that never started still owes its line, unless the plain path
# already printed it and left the message empty
def owed(empty: Bool, +msg: String) -> IO(Unit):
  match empty:
    case True{}:
      IO.pure(Unit, Unit{})
    case False{}:
      IO.print_err(msg)

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO.print_err
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO.pure
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Unit