docs: function Process(model, pid) {
      if (model === undefined)
        throw new Error('model must be provided');
      if (pid === undefined)
        throw new Error('pid must be provided');
      tr.model.ProcessBase.call(this, model);
      this.pid = pid;
      this.name = undefined;
      this.labels = [];
      this.instantEvents = [];
      this.memoryDumps = [];
      this.frames = [];
      this.activities = [];
    }