docs: 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
          return builder.convert(
                  new StorageConverterPluginAdapter(pluginType,converterPlugin),
                  null != path ? PathUtil.asPath(path.trim()) : null,
                  null != selector ? PathUtil.<ResourceMeta>resourceSelector(selector) : null
          );
      }