code: public static List<ExtensionConfig> parseList(String... rawSecWebSocketExtensions) {
          List<ExtensionConfig> configs = new ArrayList<>();
  
          for (String rawValue : rawSecWebSocketExtensions) {
              Iterator<String> extTokenIter = QuoteUtil.splitAt(rawValue, ",");
              while (extTokenIter.hasNext()) {
                  String extToken = extTokenIter.next();
                  configs.add(ExtensionConfig.parse(extToken));
              }
          }
  
          return configs;
      }
docs: Parse 1 or more raw <code>Sec-WebSocket-Extensions</code> header values into a {@link ExtensionConfig} list
  
  @param rawSecWebSocketExtensions the raw header values
  @return the list of extension configs