@Override
  public String toString() {
    return "TaskModel [taskName=" + taskName + ", systemStreamPartitions=" + systemStreamPartitions
        + ", changeLogPartition=" + changelogPartition + ", taskMode=" + this.taskMode + "]";
  }
Returns the {@link Partition} used for all changelogs for this task.
@return changelog partition for this task
samza-api/src/main/java/org/apache/samza/job/model/TaskModel.java