pub fn kill(process: ChildProcess) -> Result(Nil, error.Error)

pub fn kill_with(
  process: ChildProcess,
  with signal: signal.Signal,
) -> Result(Nil, error.Error)

pub fn output(
  of process: ChildProcess,
) -> promise.Promise(
  Result(command_output.CommandOutput, error.Error),
)

pub fn pid(of process: ChildProcess) -> Int

pub fn ref(process: ChildProcess) -> ChildProcess

pub fn status(
  of process: ChildProcess,
) -> promise.Promise(
  Result(command_status.CommandStatus, error.Error),
)

pub fn stderr(
  of process: ChildProcess,
) -> Result(
  readable_stream.ReadableStream(uint8_array.Uint8Array),
  error.Error,
)

pub fn stdin(
  of process: ChildProcess,
) -> Result(
  writable_stream.WritableStream(uint8_array.Uint8Array),
  error.Error,
)

pub fn stdout(
  of process: ChildProcess,
) -> Result(
  readable_stream.ReadableStream(uint8_array.Uint8Array),
  error.Error,
)

pub fn unref(process: ChildProcess) -> ChildProcess

pub fn using(
  process: ChildProcess,
  apply fun: fn(ChildProcess) -> promise.Promise(a),
) -> promise.Promise(a)