    # File lib/termtter/config.rb, line 19
        def set_default(name, value)
          match_p, init, last = *name.to_s.match(/^(.+)\.([^\.]+)$/)
          if match_p
            tmp = eval(init)
            if tmp.__refer__(last.to_sym).empty?
              tmp.__assign__(last.to_sym, value)
            end
          else
            current_value = __refer__(name.to_sym)
            if current_value.kind_of?(self.class) && current_value.empty?
              __assign__(name.to_sym, value)
            end
          end
        end