code: ImmutableList<Measurement> toMeasurements() {
      for (Entry<Allocation> entry : allocations.entrySet()) {
        double allocsPerRep = ((double) entry.getCount()) / reps;
        System.out.printf("Allocated %f allocs per rep of %s%n", allocsPerRep, entry.getElement());
      }
      return ImmutableList.of(
          new Measurement.Builder()
              .value(Value.create(allocationCount, ""))
              .description("objects")
              .weight(reps)
              .build(),
          new Measurement.Builder()
              .value(Value.create(allocationSize, "B"))
              .weight(reps)
              .description("bytes")
              .build());
    }
docs: Returns a list of {@link Measurement measurements} based on this collection of stats.