code: @SuppressWarnings("unused")
      private void setDraggingToRow(int row, boolean isDragging) {
          Collection<ViewHolder> holders = mViewHolders.getRowItems(row);
          for (ViewHolder holder : holders) {
              holder.setIsDragging(isDragging);
          }
  
          ViewHolder holder = mHeaderRowViewHolders.get(row);
          if (holder != null) {
              holder.setIsDragging(isDragging);
          }
      }
docs: Method set dragging flag to all view holders in the specific row
  
  @param row        specific row
  @param isDragging flag to set