MultiCellEditDialog dialog =
                new MultiCellEditDialog(parent.getShell(), cellEditor, originalCanonicalValue,
                                initialEditValue, allowIncrementDecrement, configRegistry,
                                lastSelectedCell);

int returnValue = dialog.open();

ActiveCellEditor.close();

if (returnValue == Window.OK) {
    try {
        Object editorValue = dialog.getEditorValue();