type io.WriteCloser

9 uses

	io (current package)
		io.go#L143: type WriteCloser interface {

	encoding/base64
		base64.go#L273: func NewEncoder(enc *Encoding, w io.Writer) io.WriteCloser {

	encoding/hex
		hex.go#L224: func Dumper(w io.Writer) io.WriteCloser {

	github.com/klauspost/compress/flate
		stateless.go#L51: func NewStatelessWriter(dst io.Writer) io.WriteCloser {

	net/http/internal
		chunked.go#L212: func NewChunkedWriter(w io.Writer) io.WriteCloser {

	net/textproto
		writer.go#L43: func (w *Writer) DotWriter() io.WriteCloser {

	nhooyr.io/websocket
		write.go#L30: func (c *Conn) Writer(ctx context.Context, typ MessageType) (io.WriteCloser, error) {
		write.go#L96: func (c *Conn) writer(ctx context.Context, typ MessageType) (io.WriteCloser, error) {

	vendor/golang.org/x/text/unicode/norm
		readwriter.go#L66: func (f Form) Writer(w io.Writer) io.WriteCloser {