code: public void filter(Map<String, String> output, String key, String value,
  			ResultURIConverter uriConverter, CaptureSearchResult result) {
  		if (key.equalsIgnoreCase(HTTP_TRANSFER_ENCODING_HEADER_UP))
  			preserve(output, key, value);
  		else
  			output.put(key, value);
  	}
docs: /* (non-Javadoc)
  @see org.archive.wayback.replay.HttpHeaderProcessor#filter(java.util.Map, java.lang.String, java.lang.String, org.archive.wayback.ResultURIConverter, org.archive.wayback.core.CaptureSearchResult)