code: @Override
      public Table<AllocationStatus, Integer, Long> getAllocationStatistics() {
          Table<AllocationStatus, Integer, Long> table = HashBasedTable.create();
          table.put(AllocationStatus.HOST, 0, zeroUseCounter.get());
          for (Integer deviceId : configuration.getAvailableDevices()) {
              table.put(AllocationStatus.DEVICE, deviceId, getAllocatedDeviceMemory(deviceId));
          }
          return table;
      }
docs: This method returns total amount of memory allocated within system
  
  @return