code: public boolean add(final List<LongTuple<T>> list, boolean remove_added_elements) {
          return add(list, remove_added_elements, null);
      }
docs: Adds elements from list to the table, removes elements from list that were not added to the table
  @param list
  @return True if at least 1 element was added successfully. This guarantees that the list has at least 1 element