Bytes is a channel that can be used to write and read byte slices and that can be safely closed even with pending writes.

Error is a channel that can be used to write and read errors and that can be safely closed even with pending writes.

Func is a channel that can be used to write and read no-argument functions and that can be safely closed even with pending writes.

Int is a channel that can be used to write and read ints and that can be safely closed even with pending writes.

IO is a channel that can be used to write and read io results and that can be safely closed even with pending writes.