Session::isFirstOperatorMessage

public function isFirstOperatorMessage($messageId)
{
	$message = MessageTable::getList(
		[
			'select' => ['ID'],
			'order' => ['ID' => 'ASC'],
			'filter' => [
				'CHAT.ENTITY_ID' => $this->getData('USER_CODE'),
				'CHAT.ENTITY_TYPE' => 'LINES',
				'AUTHOR_ID' => $this->getData('OPERATOR_ID'),
				'>ID' => $this->getData('START_ID')
			]
		]
	)->fetch();

	return $message['ID'] == $messageId;
}