private boolean moveBuckets() {
    Move bestMove = model.findBestBucketMove();

    if (bestMove == null) {
      return false;
    }

    model.moveBucket(bestMove);

    return true;
  }
Move a single bucket from one member to another.

@return true if we could move the bucket
geode-core/src/main/java/org/apache/geode/internal/cache/partitioned/rebalance/MoveBuckets.java