nits.
    checkAggregateNumerics(
        [new Scalar(sizeInBytes, 10),
          new Scalar(powerInWatts, 20)],
        30, unitlessNumber_smallerIsBetter, 1 /* opt_expectedWarningCount */);
    checkAggregateNumerics(
        [undefined,
          new Scalar(powerInWatts, 16),
          undefined,
          new Scalar(unitlessNumber_smallerIsBetter, 32),
          undefined,
          new Scalar(sizeInBytes, 64),
          undefined],
        112, unitlessNumber_smallerIsBetter, 1 /* opt_expectedWarningCo