docs: function(that, precisionUnit) {
        if (precisionUnit === undefined) {
          precisionUnit = tr.b.u.TimeDisplayModes.ms;
        }
        var startsBefore = precisionUnit.roundedLess(that.start, this.start);
        var endsAfter = precisionUnit.roundedLess(this.end, that.end);
        return !startsBefore && !endsAfter;
      }