ApiPlatform\Core\Swagger\Serializer\DocumentationNormalizer::getFiltersParameters PHP Method

    private function getFiltersParameters(string $resourceClass, string $operationName, ResourceMetadata $resourceMetadata) : array
    {
        if (null === $this->filterCollection) {
            return [];
        }
        $parameters = [];
        $resourceFilters = $resourceMetadata->getCollectionOperationAttribute($operationName, 'filters', [], true);
        foreach ($this->filterCollection as $filterName => $filter) {
            if (!in_array($filterName, $resourceFilters)) {
                continue;
            }
            foreach ($filter->getDescription($resourceClass) as $name => $data) {
                $parameter = ['name' => $name, 'in' => 'query', 'required' => $data['required']];
                $parameter += $this->getType($data['type'], false);
                if (isset($data['swagger'])) {
                    $parameter = $data['swagger'] + $parameter;
                }
                $parameters[] = $parameter;
            }
        }
        return $parameters;
    }