FieldSynchronizer::getSchemaMainEntity

private function getSchemaMainEntity(array $schema) : string
{
	if (!$mainEntity = \CCrmOwnerType::ResolveName($schema['MAIN_ENTITY']))
	{
		foreach ($this->orderSchemaEntities($schema) as $entityType)
		{
			if ($entityType !== \CCrmOwnerType::InvoiceName)
			{
				$mainEntity = $entityType;
				break;
			}
		}
	}

	return $mainEntity;
}