def selected?(value)
      assert_exists
      raise UnknownObjectException, "unknown option with value #{value.inspect} for select_list #{@conditions.inspect}" unless include?(value)
      !!@object.getOptions.find { |e| matches_option?(e, value) && e.isSelected }
    end
def selected?(value)
      assert_exists
      raise UnknownObjectException, "unknown option with value #{value.inspect} for select_list #{@conditions.inspect}" unless include?(value)
      !!@object.getOptions.find { |e| matches_option?(e, value) && e.isSelected }
    end
Returns true if any of the selected options match the given value.

 @param [String, Regexp] value A value.
 @raise [Celerity::Exception::UnknownObjectException] if the value does not exist.
 @return [true, false]