void move() {
          if (iter.hasNext()) {
            current = iter.next();
          } else {
            current = null;
            EOF = true;
          }
        }
The n - way merge results returns a sorted results on the cumulative sorted results for
partitioned region based query
geode-core/src/main/java/org/apache/geode/cache/query/internal/NWayMergeResults.java