@Override
  public Map<SystemStreamPartition, String> getOffsets() {
    return inputOffsets;
  }
Gets a unmodifiable view of the current input {@link SystemStreamPartition} offsets.
@return An unmodifiable map of input {@link SystemStreamPartition}s to their recorded offsets.
samza-api/src/main/java/org/apache/samza/checkpoint/CheckpointV2.java