public void clear_objects_from_the_explorer_pane()
{
var leftObject1 = new object();
var leftObject2 = new object();
registry.PlaceInExplorerPane(leftObject1, "some text");
registry.PlaceInExplorerPane(leftObject2, "some text");
registry.ClearTransient();
shell.AssertWasCalled(x => x.RemoveFromExplorerPane(leftObject1));
shell.AssertWasCalled(x => x.RemoveFromExplorerPane(leftObject2));
}