*
* @return builder
*/
private TreeBuilder<ResourceMeta> buildConverterPlugin(TreeBuilder<ResourceMeta> builder, String pluginType,
String path, String selector, Map<String, String> config) {
StorageConverterPlugin converterPlugin = loadPlugin(
pluginType,
config,
storageConverterPluginProviderService
);
//convert tree under the subpath if specified, AND matching the selector if specified