A <code>nil</code> channel is never ready for communication.
</p>

<p>
A channel may be closed with the built-in function
<a href="#Close"><code>close</code></a>.
The multi-valued assignment form of the
<a href="#Receive_operator">receive operator</a>
reports whether a received value was sent before
the channel was closed.
</p>

<p>
A single channel may be used in

pkg io, func NopCloser(Reader) ReadCloser
pkg io, func ReadAll(Reader) ([]uint8, error)
pkg io, type ReadSeekCloser interface { Close, Read, Seek }
pkg io, type ReadSeekCloser interface, Close() error
pkg io, type ReadSeekCloser interface, Read([]uint8) (int, error)
pkg io, type ReadSeekCloser interface, Seek(int64, int) (int64, error)
pkg io, var Discard Writer

pkg log/syslog (netbsd-arm64-cgo), func New(Priority, string) (*Writer, error)
pkg log/syslog (netbsd-arm64-cgo), method (*Writer) Alert(string) error
pkg log/syslog (netbsd-arm64-cgo), method (*Writer) Close() error
pkg log/syslog (netbsd-arm64-cgo), method (*Writer) Crit(string) error
pkg log/syslog (netbsd-arm64-cgo), method (*Writer) Debug(string) error
pkg log/syslog (netbsd-arm64-cgo), method (*Writer) Emerg(string) error