func (c *Client) SendKeepAlive() (n int, err error) {
	return fmt.Fprintf(c.conn, " ")
}
func (c *Client) SendKeepAlive() (n int, err error) {
	return fmt.Fprintf(c.conn, " ")
}
// SendKeepAlive sends a "whitespace keepalive" as described in chapter 4.6.1 of RFC6120.