private function resolveContextValue(
        ServerConfig $config,
        OperationParams $params,
        DocumentNode $doc,
        $operationType
    ) {
        $context = $config->getContext();

        if (is_callable($context)) {
            $context = $context($params, $doc, $operationType);
        }

        return $context;
    }
private function resolveContextValue(
        ServerConfig $config,
        OperationParams $params,
        DocumentNode $doc,
        $operationType
    ) {
        $context = $config->getContext();

        if (is_callable($context)) {
            $context = $context($params, $doc, $operationType);
        }

        return $context;
    }
@param string $operationType

@return mixed