/**
* @param string $entityClass
* @param string $version
*
* @return array|null
*/
protected function loadConfig($entityClass, $version)
{
$config = $this->configBag->getRelationConfig($entityClass, $version);
if (empty($config) || ConfigUtil::isInherit($config)) {
$parentClasses = $this->entityHierarchyProvider->getHierarchyForClassName($entityClass);
foreach ($parentClasses as $parentClass) {
$parentConfig = $this->configBag->getRelationConfig($parentClass, $version);
if (!empty($parentConfig)) {
$config = $this->mergeConfigs($parentConfig, $config);
if (!ConfigUtil::isInherit($parentConfig)) {
break;
}
}
}
}
return !empty($config) ? $config : null;
}