@Test public void getIndex() { assertThat(level.getIndex()).isEqualTo(3); }
@Override public int getIndex() { return 3; }
MediumLevelThree extends AbstractMediumLevel { @Override public int getIndex() { return 3; } }
MediumLevelThree extends AbstractMediumLevel { @Override public int getIndex() { return 3; }  }
MediumLevelThree extends AbstractMediumLevel { @Override public int getIndex() { return 3; }  @Override GameSession create(Configuration config); @Override int getIndex(); }
MediumLevelThree extends AbstractMediumLevel { @Override public int getIndex() { return 3; }  @Override GameSession create(Configuration config); @Override int getIndex();  }