message: Add comment to hypre method.
diff: @@ -530,6 +530,7 @@ public:
  matrix and Ae sum to the original matrix. */
  HypreParMatrix* EliminateCols(const Array<int> &cols);
  + /// Eliminate rows from the diagonal and off-diagonal blocks of the matrix.
  void EliminateRows(const Array<int> &rows);
  /// Prints the locally owned rows in parallel
  