def option(flag)
      options.find do |o|
        o.flags.any? { |f| clean_key(f) == clean_key(flag) }
      end
    end
def option(flag)
      options.find do |o|
        o.flags.any? { |f| clean_key(f) == clean_key(flag) }
      end
    end
Returns an Option if it exists. Ignores any prefixed hyphens.