/*!
     * \brief Replace value at the global row index. The global index must
     * exist on process.
     */
    static void replaceGlobalValue( vector_type& vector,
    				    global_ordinal_type global_row,
    				    const scalar_type& value )
    {
	MCLS_REQUIRE( vector.getMap()->isNodeGlobalElement( global_row ) );
	vector.replaceGlobalValue( global_row, value );
    }