private function getContext(): array
    {
        return [
            '@vocab' => $this->urlGenerator->generate('api_doc', ['_format' => self::FORMAT], UrlGeneratorInterface::ABS_URL).'#',
            'hydra' => ContextBuilderInterface::HYDRA_NS,
            'rdf' => ContextBuilderInterface::RDF_NS,
            'rdfs' => ContextBuilderInterface::RDFS_NS,
            'xmls' => ContextBuilderInterface::XML_NS,
            'owl' => ContextBuilderInterface::OWL_NS,
            'schema' => ContextBuilderInterface::SCHEMA_ORG_NS,
            'domain' => ['@id' => 'rdfs:domain', '@type' => '@id'],
            'range' => ['@id' => 'rdfs:range', '@type' => '@id'],
            'subClassOf' => ['@id' => 'rdfs:subClassOf', '@type' => '@id'],
            'expects' => ['@id' => 'hydra:expects', '@type' => '@id'],
            'returns' => ['@id' => 'hydra:returns', '@type' => '@id'],
        ];
    }