code: private void setHeaderList(Map<String, List<String>> headers, String name, String value) {
  
          List<String> values = new ArrayList<String>();
          values.add(SET_HEADER + value);
          headers.put(name, values);
      }
docs: Helper method to set a value in the internal header list.
  
  @param headers the headers to set the value in
  @param name the name to set
  @param value the value to set