docs: function(timeShift) {
        this.forEachLine(function(text, eventBase, cpuNumber, pid, ts) {
          var eventName = eventBase.eventName;
          var handler = this.eventHandlers_[eventName];
          if (!handler) {
            this.model_.importWarning({
              type: 'parse_error',
              message: 'Unknown event ' + eventName + ' (' + text + ')'
            });
            return;
          }
          ts += timeShift;
          if (!handler(eventName, cpuNumber, pid, ts, eventBase)) {
            this.model_.importWarning({
              type: 'parse_error',
              message: 'Malformed ' + eventName + ' event (' + text + ')'
            });
          }
        }.bind(this));
      }