code: func (c *Target) SendMessageToTarget(message string, sessionId string, targetId string) (*gcdmessage.ChromeResponse, error) {
  	var v TargetSendMessageToTargetParams
  	v.Message = message
  	v.SessionId = sessionId
  	v.TargetId = targetId
  	return c.SendMessageToTargetWithParams(&v)
  }
docs: // SendMessageToTarget - Sends protocol message over session with given id.
  // message -
  // sessionId - Identifier of the session.
  // targetId - Deprecated.