# File lib_ctrl/rucy/properties.rb, line 77
    def map(name)
      transaction{
        if (@store[name]) then
          map = @store[name].dup
          unless (map.kind_of? Hash) then
            raise "not a map property: #{name}."
          end
        else
          map = Hash.new
        end
        map.extend(ModifiedCount)
        mc_set(map)
        return map
      }
    end