code: public ModelAdapter<?, Item> removeRange(int position, int itemCount) {
          if (mOriginalItems != null) {
              //global position to relative
              int length = mOriginalItems.size();
              int preItemCount = mItemAdapter.getFastAdapter().getPreItemCount(position);
              //make sure we do not delete to many items
              int saveItemCount = Math.min(itemCount, length - position + preItemCount);
              for (int i = 0; i < saveItemCount; i++) {
                  mOriginalItems.remove(position - preItemCount);
              }
              publishResults(mConstraint, performFiltering(mConstraint));
              return mItemAdapter;
          } else {
              return mItemAdapter.removeRange(position, itemCount);
          }
      }
docs: removes a range of items starting with the given position within the existing icons
  
  @param position  the global position
  @param itemCount the count of items which were removed