final Layer layer = targetMap.getLayersInternal().get(0);
action.init(null, null, ViewerDropLocation.NONE, layer, filter);
assertTrue(action.accept());
assertEquals(Filter.EXCLUDE, layer.getFilter());
action.perform(new NullProgressMonitor());
assertEquals(filter, layer.getFilter());
layer.setFilter( null ); // Filter.EXCLUDE;
action.init(null, null, ViewerDropLocation.NONE, layer, aF);
action.perform(new NullProgressMonitor());