code: public final void addParser(@NotNull final ParserConfig parser) {
          Contract.requireArgNotNull("parser", parser);
          if (parsers == null) {
              parsers = new Parsers();
          }
          parsers.addParser(parser);
      }
docs: Adds a parser to the configuration. If the list of parsers does not exist it will be created.
  
  @param parser
  Parser to add.