code: public <K> DedicatedMultiRowUniquenessConstraint<C> withRow(ColumnFamily<K, C> columnFamily, K rowKey) {
          locks.add(new Row<K>(columnFamily, rowKey));
          return this;
      }
docs: Add a row to the set of rows being tested for uniqueness
  
  @param columnFamily
  @param rowKey
  @return