code: private boolean getLocalItemSupport(FPTree.Node node, int[] localItemSupport) {
          boolean end = true;
          Arrays.fill(localItemSupport, 0);
          while (node != null) {
              int support = node.count;
              Node parent = node.parent;
              while (parent != null) {
                  localItemSupport[parent.id] += support;
                  parent = parent.parent;
                  end = false;
              }
              
              node = node.next;
          }
  
          return !end;
      }
docs: Counts the supports of single items in ancestor item sets linked list.
  @return true if there are condition patterns given this node