Selecting an unselected row dispatches two selection events

[RhonanMS]

I am using a SelectGrid with a TableSelectionModel using the selection mode TableSelectionMode.SHIFT.

When selecting a previously unselected row without holding the Ctrl key, the underlying CtrlClickSelectionHandler calls SelectionModel<JsonObject>.deselectAll(). This triggers an event with an empty selection, almost immediately following by an event with the newly selected row.

Example:

SelectGrid<T> grid2 = new SelectGrid<>();
TableSelectionModel<T> tableSelectionModel = new TableSelectionModel<>();
tableSelectionModel.setMode(TableSelectionMode.SHIFT);
grid2.setSelectionModel(tableSelectionModel);
grid2.addSelectionListener(event -> {
	LOGGER.debug(String.format("%d entries in selection", 
		event.getAllSelectedItems().size()));
});

When selecting a row as described above, the logger returns the following:

[DEBUG] 0 entries in selection 
[DEBUG] 1 entries in selection 

I would have expected only one event containing the new selection instead of two, one of which contains an empty selection. Is it possible to allow for this behaviour?