type io.ReadWriteCloser

7 uses

	io (current package)
		io.go#L149: type ReadWriteCloser interface {

	net/http
		transport.go#L2600: func newReadWriteCloserBody(br *bufio.Reader, rwc io.ReadWriteCloser) io.ReadWriteCloser {
		transport.go#L2616: 	io.ReadWriteCloser

	net/http/httputil
		reverseproxy.go#L832: 	backConn, ok := res.Body.(io.ReadWriteCloser)

	net/textproto
		textproto.go#L64: 	conn io.ReadWriteCloser
		textproto.go#L68: func NewConn(conn io.ReadWriteCloser) *Conn {