public SystemStreamPartitionIterator getStartIterator() {
    return new SystemStreamPartitionIterator(systemConsumer, coordinatorSystemStreamPartition);
  }
Gets an iterator on the coordinator stream, starting from the starting offset the consumer was registered with.

@return an iterator on the coordinator stream pointing to the starting offset the consumer was registered with.
samza-core/src/main/java/org/apache/samza/coordinator/stream/CoordinatorStreamSystemConsumer.java