@Test public void getIndex() { assertThat(level.getIndex()).isEqualTo(2); }
@Override public int getIndex() { return 2; }
HardLevelTwo extends AbstractHardLevel { @Override public int getIndex() { return 2; } }
HardLevelTwo extends AbstractHardLevel { @Override public int getIndex() { return 2; }  }
HardLevelTwo extends AbstractHardLevel { @Override public int getIndex() { return 2; }  @Override GameSession create(Configuration config); @Override int getIndex(); }
HardLevelTwo extends AbstractHardLevel { @Override public int getIndex() { return 2; }  @Override GameSession create(Configuration config); @Override int getIndex();  }