docs: function(eventName, cpuNumber, pid, ts, eventBase) {
        if (this.lineRE == null) {
          this.lineRE = this.autoDetectLineRE(eventBase.details);
          if (this.lineRE == null)
            return false;
        }
        var maliEvent = this.lineRE.exec(eventBase.details);
        // Old-style Mali perf events have no thread id, so make one.
        var tid = (maliEvent[1] === '' ? 'mali' : maliEvent[1]);
        switch (maliEvent[2]) {
          case 'cros_trace_print_enter':
            this.maliDDKOpenSlice(pid, tid, ts, maliEvent[4],
                maliEvent[3]);
            break;
          case 'cros_trace_print_exit':
            this.maliDDKCloseSlice(pid, tid, ts, [], maliEvent[3]);
        }
        return true;
      }