synchronized SyncableFileSystemView getSecondaryView() {
    if (secondaryView == null) {
      secondaryView = secondaryViewSupplier.get();
    }
    return secondaryView;
  }
@Test
  public void testGetSecondaryView() {
    when(secondaryViewSupplier.get()).thenReturn(secondary);
    assertEquals(secondary, fsView.getSecondaryView());
  }