code: func (c *wsConn) SetWriteDeadline(t time.Time) error {
  	return c.conn.SetWriteDeadline(t)
  }
docs: // SetWriteDeadline sets the deadline for future Write calls
  // and any currently-blocked Write call.
  // Even if write times out, it may return n > 0, indicating that
  // some of the data was successfully written.
  // A zero value for t means Write will not time out.