if($root === false) {
        throw new NoResponseException("Could not load swagger root file");
    } elseif($root === null || !isset($root->apis) || !is_array($root->apis) || !isset($root->basePath)) {
        throw new InvalidSwaggerFormatException("Invalid swagger file");
    } else {
        if(!in_array('application/json', $root->produces)) {
            throw new RequirementsException("API does not produce JSON");
        } else {
            foreach($root->apis as $api) {
                $name = explode('.', basename($api->path))[0];
                $cache[$name] = $root->basePath . str_replace("{format}", "json", $api->path);
            }
        }
    }
    return $cache;
}