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/**
 * <p>Assign the partitions given as the key of the given <code>assignments</code> to the corresponding 
 * list of brokers. This can be used to change the replica assignment or change the topic's replication factor. 
 * The first broker in each list is the one which holds the "preferred replica".</p>
 *
 * <p>Inter-broker reassignment and/or increasing the replication factor causes significant 
 * inter-broker traffic and can take a long time 
 * in order to copy the replica data to brokers. It may be necessary to impose a quota on 
 * inter-broker traffic for the duration of the reassignment so that client-broker traffic is not
 * adversely affected.</p>
 *
 * <h3>Preferred replica</h3>
 * <p>When brokers are configured with <code>auto.leader.rebalance.enable=true</code>, the broker
 * with the preferred replica will be elected leader automatically. 
 * <code>kafka-preferred-replica-election.sh</code> provides a manual trigger for this 
 * election when <code>auto.leader.rebalance.enable=false</code>.</p>
 */
public ReassignPartitionsResult reassignPartitions(Map<TopicPartition, List<Integer>> assignments)
public ReassignPartitionsResult reassignPartitions(Map<TopicPartition, List<Integer>> assignments, 
                        ReassignPartitionsOptions options)