@NotNull
    @Override
    protected Map<String, HeaderParser> compute() {
      Map<String, HeaderParser> map = CollectionFactory.createCaseInsensitiveStringMap();
      for (HeaderParserProvider provider : HeaderParserProvider.EP_NAME.getExtensionList()) {
        map.putAll(provider.getHeaderParsers());
      }
      return map;
    }
@NotNull
    @Override
    protected Map<String, HeaderParser> compute()