InvoiceBinder::unbindEntities

public function unbindEntities($associatedEntityTypeID, $associatedEntityID, array $entityIDs)
{
	if($associatedEntityTypeID === \CCrmOwnerType::Contact)
	{
		$fieldName = 'UF_CONTACT_ID';
	}
	else if($associatedEntityTypeID === \CCrmOwnerType::Company)
	{
		$fieldName = 'UF_COMPANY_ID';
	}
	else if($associatedEntityTypeID === \CCrmOwnerType::Deal)
	{
		$fieldName = 'UF_DEAL_ID';
	}
	else
	{
		$entityTypeName = \CCrmOwnerType::ResolveName($associatedEntityTypeID);
		throw new Main\NotSupportedException("Entity '{$entityTypeName}' not supported in current context.");
	}

	$dbResult = \CCrmInvoice::GetList(
		array('ID' => 'ASC'),
		array('@ID' => $entityIDs),
		false,
		false,
		array('ID', $fieldName)
	);

	$entity = new \CCrmInvoice(false);
	while($fields = $dbResult->Fetch())
	{
		if(isset($fields[$fieldName]) && $fields[$fieldName] == $associatedEntityID)
		{
			$entity->Update(
				$fields['ID'],
				array($fieldName => null),
				$this->getUnbindUpdateOptions((int)$associatedEntityTypeID, [$associatedEntityID]),
			);
		}
	}
}