code: public void addAll(IntBitRelation right) {
          int i, max;
  
          max = right.line.length;
          for (i = 0; i < max; i++) {
              if (right.line[i] != null) {
                  add(i, right.line[i]);
              }
          }
      }
docs: Adds all element from the relation specified.
  @param  right   relation to add.