code: public java.util.List<ConfigureShard> getReplicaConfiguration() {
          if (replicaConfiguration == null) {
              replicaConfiguration = new com.amazonaws.internal.SdkInternalList<ConfigureShard>();
          }
          return replicaConfiguration;
      }
docs: <p>
  A list of <code>ConfigureShard</code> objects that can be used to configure each shard in a Redis (cluster mode
  enabled) replication group. The <code>ConfigureShard</code> has three members: <code>NewReplicaCount</code>,
  <code>NodeGroupId</code>, and <code>PreferredAvailabilityZones</code>.
  </p>
  
  @return A list of <code>ConfigureShard</code> objects that can be used to configure each shard in a Redis
  (cluster mode enabled) replication group. The <code>ConfigureShard</code> has three members:
  <code>NewReplicaCount</code>, <code>NodeGroupId</code>, and <code>PreferredAvailabilityZones</code>.