docs: function (object) {
              var index = this.data.indexOf(object);
              if (index !== -1) {
                  this.data.splice(index, 1);
              }
              this.eachMap(function (map, mapName) {
                  this.removeObjectFromMap(mapName, object);
              });
              delete this.mapValues[object.id];
              return this;
          }