code: public static Node addPartitionToNode(final Node node, Integer donatedPartition) {
          return UpdateClusterUtils.addPartitionsToNode(node, Sets.newHashSet(donatedPartition));
      }
docs: Add a partition to the node provided
  
  @param node The node to which we'll add the partition
  @param donatedPartition The partition to add
  @return The new node with the new partition