code: function addRowWithTime(tablePrinter, eventTime, startTime) {
      tablePrinter.addRow();
      tablePrinter.addCell('t=');
      const tCell = tablePrinter.addCell(eventTime);
      tCell.alignRight = true;
      tablePrinter.addCell(' [st=');
      const stCell = tablePrinter.addCell(eventTime - startTime);
      stCell.alignRight = true;
      tablePrinter.addCell('] ');
    }
docs: Adds a new row to the given TablePrinter, and adds five cells containing
  information about the time an event occured.
  Format is '[t=<time of the event in ms>] [st=<ms since the source
  started>]'.
  @param {TablePrinter} tablePrinter The table printer to add the cells to.
  @param {number} eventTime The time the event occured, in milliseconds,
  relative to some base time.
  @param {number} startTime The time the first event for the source occured,
  relative to the same base time as eventTime.