/*!
     * \brief Replace value at the local row index. The local index must exist
     * on process.
     */
    static void replaceLocalValue( vector_type& vector,
    				   local_ordinal_type local_row,
    				   const scalar_type& value )
    {
	MCLS_REQUIRE( vector.getMap()->isNodeLocalElement( local_row ) );
	vector.replaceLocalValue( local_row, value );
    }