You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: conn.go
    path of file: ./repos/devspace/vendor/github.com/pkg/sftp
    
    the code of the file until where you have to start completion: package sftp

import (
	"encoding"
	"io"
	"sync"

	"github.com/pkg/errors"
)

// conn implements a bidirectional channel on which client and server
// connections are multiplexed.
type conn struct {
	io.Reader
	io.WriteCloser
	// this is the same
    
func (c *clientConn) putChannel(ch chan<- result, sid uint32) bool {
	c.Lock()
	defer c.Unlock()

	select {
	case <-c.closed:
		// already closed with broadcastErr, return error on chan.
		ch <- result{err: ErrSSHFxConnectionLost}
		return false
	default:
	}

	c.inflight[sid] = ch
	return true
}