def keyword_arg(key, desc, opts = {}, &block)
            self << ArgParser::KeywordArgument.new(key, desc, opts, &block)
        end
def keyword_arg(key, desc, opts = {}, &block)
            self << ArgParser::KeywordArgument.new(key, desc, opts, &block)
        end
Add a keyword argument to the set of arguments in this command-line
 argument definition.
 @see KeywordArgument#initialize