Transferor::startBlindTransfer

static function startBlindTransfer($callId, $userId)
{
	$transferCall = Call::load($callId);
	if(!$transferCall)
	{
		return false;
	}

	$parentCall = Call::load($transferCall->getParentCallId());
	$transferCall->removeUsers([$userId], false);
	$parentCall->removeUsers([$userId]);
}