func (c *Client) Out() []byte {
	if c.out.Len() == 0 {
		return nil
	}
	return c.out.Bytes()
}
func (c *Client) Out() []byte {
	if c.out.Len() == 0 {
		return nil
	}
	return c.out.Bytes()
}
func ( c * Client ) Out ( ) [ ] byte { if c . out . Len ( ) == 0 { return nil } return c . out . Bytes ( ) }
// Out returns the data to be sent to the server in the current step.
Out returns the data to be sent to the server in the current step .