--- OptionParser::List#update(sw, sopts, lopts, nlopts = nil)
    Adds sw according to sopts, lopts and
    nlopts.
    :Parameters:
      : sw
        OptionParser::Switch instance to be added.
      : sopts
        short style options list.
      : lopts
        long style options list.
      : nlopts
        negated long style options list.

