// Make new channel. Provide a length to make a buffered channel.
func Make(length int) C

type C interface {
	// Send a messge to the channel. Returns false if the channel is closed.
	Send(v interface{}) (ok bool)
	// Recv a messge from the channel. Returns false if the channel is closed.
	Recv() (v interface{}, ok bool)
	// Close the channel. Returns false if the channel is already closed.
	Close() (ok bool)
	// Wait for the channel to close. Returns immediately if the channel is
	// already closed
	Wait()
}