docs: function ThreadSlice(cat, title, colorId, start, args, opt_duration,
                         opt_cpuStart, opt_cpuDuration, opt_argsStripped,
                         opt_bind_id) {
      Slice.call(this, cat, title, colorId, start, args, opt_duration,
                 opt_cpuStart, opt_cpuDuration, opt_argsStripped, opt_bind_id);
      // Do not modify this directly.
      // subSlices is configured by SliceGroup.rebuildSubRows_.
      this.subSlices = [];
    }