docs: function(key, southwest, northeast) {
          if (!(southwest instanceof AV.GeoPoint)) {
            southwest = new AV.GeoPoint(southwest);
          }
          if (!(northeast instanceof AV.GeoPoint)) {
            northeast = new AV.GeoPoint(northeast);
          }
          this._addCondition(key, '$within', { $box: [southwest, northeast] });
          return this;
        }