testSettersAfterInit() {
    assertTrue(googArray.equals(
        dlg.dragItemHoverClasses_, ['opacity_40', 'cursor_move']));
    assertTrue(googArray.equals(
        dlg.dragItemHandleHoverClasses_, ['opacity_40', 'cursor_pointer']));
    assertTrue(
        googArray.equals(dlg.currDragItemClasses_, ['blue_bg', 'opacity_40']));

    assertFalse(
        'Should have no cursor_move class after init',
        classlist.contains(event.currentTarget, 'cursor_move'));
    assertFalse(
        'Should have no cursor_pointer class after init',
        classlist.contains(event.currentTarget, 'cursor_pointer'));
    assertFalse(
        'Should have no opacity_40 class after init',
        classlist.contains(event.currentTarget, 'opacity_40'));
    assertFalse(
        'Should not have blue_bg class after init',
        classlist.contains(event.currentTarget, 'blue_bg'));
  }
Test the initial assumptions.
Verify that the setter methods work properly, i.e., the CSS classes are
stored in the private arrays after init() but are not added yet to target.
(Since initially, we are not yet hovering over any list, in particular,
over this target.)
@suppress {visibility,checkTypes} suppression added to enable type checking