    # File lib/chef/sandbox.rb, line 98
        def to_json(*a)
          result = {
            :guid => guid,
            :name => name,   # same as guid, used for id_map
            :checksums => checksums,
            :create_time => create_time,
            :is_completed => is_completed,
            :json_class => self.class.name,
            :chef_type => 'sandbox'
          }
          result["_rev"] = @couchdb_rev if @couchdb_rev
          result.to_json(*a)
        end