code: @Override
      public ListAllowedNodeTypeModificationsResult listAllowedNodeTypeModifications(ListAllowedNodeTypeModificationsRequest request) {
          request = beforeClientExecution(request);
          return executeListAllowedNodeTypeModifications(request);
      }
docs: <p>
  Lists all available node types that you can scale your Redis cluster's or replication group's current node type
  up to.
  </p>
  <p>
  When you use the <code>ModifyCacheCluster</code> or <code>ModifyReplicationGroup</code> operations to scale up
  your cluster or replication group, the value of the <code>CacheNodeType</code> parameter must be one of the node
  types returned by this operation.
  </p>
  
  @param listAllowedNodeTypeModificationsRequest
  The input parameters for the <code>ListAllowedNodeTypeModifications</code> operation.
  @return Result of the ListAllowedNodeTypeModifications operation returned by the service.
  @throws CacheClusterNotFoundException
  The requested cluster ID does not refer to an existing cluster.
  @throws ReplicationGroupNotFoundException
  The specified replication group does not exist.
  @throws InvalidParameterCombinationException
  Two or more incompatible parameters were specified.
  @throws InvalidParameterValueException
  The value for a parameter is invalid.
  @sample AmazonElastiCache.ListAllowedNodeTypeModifications
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/elasticache-2015-02-02/ListAllowedNodeTypeModifications"
  target="_top">AWS API Documentation</a>