BalancePlan (Solr 9.7.0 core API)

```
public interface BalancePlan
```
A fully specified plan or instructions for replica balancing to be applied to the cluster.
Fully specified means the actual Node's on which to place replicas have been decided.
Instances are created by plugin code using BalancePlanFactory. This interface obviously doesn't expose much but the underlying Solr side implementation has all that is needed (and will do at least one cast in order to execute the plan, likely then using some type of visitor pattern).

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  Map<Replica,Node> getReplicaMovements()
  
  BalanceRequest getRequest()

- Method Detail
  - getRequest
```
BalanceRequest getRequest()
```
    Returns:
    
    the BalanceRequest at the origin of this BalancePlan, as passed to the BalancePlanFactory method that created this instance.
  - getReplicaMovements
```
Map<Replica,Node> getReplicaMovements()
```
    Returns:
    
    the map of Replica's to the ReplicaPlacement's that describe where the replica should be placed.