conn.go
func (c *singleConn) Write(buf []byte) (int, error) {
	return c.maconn.Write(buf)
}
func (c *singleConn) Write(buf []byte) (int, error) {
	return c.maconn.Write(buf)
}
func ( c * singleConn ) Write ( buf [ ] byte ) ( int , error ) { return c . maconn . Write ( buf ) }
// Write writes data, net.Conn style
Write writes data net . Conn style