# File lib_wpm/wpm.rb, line 1179
    def get_accessor_property(prop_value, context=@context)
      if (prop_value !~ /^[_A-Za-z][_A-Za-z0-9]*\??$/) then
        raise PropertyError, "invalid accessor format: #{prop_value.inspect}: at #{@widget_id.inspect}"
      end

      attr_reader = prop_value.intern
      if (prop_value =~ /\?$/) then
        attr_writer = nil
      else
        attr_writer = "#{prop_value}=".intern
      end

      proc{ |*args|
        case (args.length)
        when 0
          context.__send__(attr_reader)
        when 1
          if (attr_writer) then
            context.__send__(attr_writer, args.first)
          else
            raise PropertyError, "read only accessor: #{attr_reader}"
          end
        else
          raise PropertyError, 'invalid accessor arguments: ' + args.map{ |a| a.inspect }.joni(', ') + ": at #{@widget_id.inspect}"
        end
      }
    end