src/Services/JsonApiService.php
public function defaultApi($apiName = null)
    {
        if (is_null($apiName)) {
            return LaravelJsonApi::$defaultApi;
        }

        LaravelJsonApi::defaultApi($apiName);

        return $apiName;
    }
public function defaultApi($apiName = null)
    {
        if (is_null($apiName)) {
            return LaravelJsonApi::$defaultApi;
        }

        LaravelJsonApi::defaultApi($apiName);

        return $apiName;
    }
Set or get the default API name.

@param string|null $apiName
@return string
@deprecated 2.0.0 setting the API name via this method will be removed (getter will remain).