ApiPlatform\Core\Metadata\Resource\ResourceMetadata::getOperationAttribute PHP Method

    private function getOperationAttribute(array $operations = null, string $operationName, string $key, $defaultValue = null, bool $resourceFallback = false)
    {
        if (isset($operations[$operationName][$key])) {
            return $operations[$operationName][$key];
        }
        if ($resourceFallback && isset($this->attributes[$key])) {
            return $this->attributes[$key];
        }
        return $defaultValue;
    }