docs: function (keyName, increment) {
        if (_emberMetalIs_none.default(increment)) {
          increment = 1;
        }
        _emberMetalDebug.assert('Must pass a numeric value to incrementProperty', !isNaN(parseFloat(increment)) && isFinite(increment));
        return _emberMetalProperty_set.set(this, keyName, (parseFloat(_emberMetalProperty_get.get(this, keyName)) || 0) + increment);
      }