@Test
public void testGetAlreadyUsedColumnNames() throws Exception {

    model.getActionCols().add(actionCol52("a"));
    model.getActionCols().add(actionCol52("b"));
    when(presenter.getModel()).thenReturn(model);
    assertEquals(2,
                 plugin.getAlreadyUsedColumnHeaders().size());
    assertTrue(plugin.getAlreadyUsedColumnHeaders().contains("a"));
    assertTrue(plugin.getAlreadyUsedColumnHeaders().contains("b"));
}