Symbol
SpawnOptions.OptionsToSubprocess
type OptionsToSubprocess<Opts extends OptionsObject> = Opts extends OptionsObject<infer In, infer Out, infer Err> ? Subprocess<Writable extends In ? 'ignore' : In, Readable extends Out ? 'pipe' : Out, Readable extends Err ? 'inherit' : Err> : Subprocess<Writable, Readable, Readable>