def valid_values
      if validators['inclusion']
        return case
          when validators['inclusion'].is_a?(Array) then validators['inclusion']
          when validators['inclusion'].is_a?(String) then validators['inclusion'].to_s.split(',').map{|v| v.to_s.strip }
          else nil
        end
      end
      nil
    end
def valid_values
      if validators['inclusion']
        return case
          when validators['inclusion'].is_a?(Array) then validators['inclusion']
          when validators['inclusion'].is_a?(String) then validators['inclusion'].to_s.split(',').map{|v| v.to_s.strip }
          else nil
        end
      end
      nil
    end
Returns all valid values for this setting, which is based on the presence of an inclusion validator.
 Will return nil if no valid values could be determined.