@Test
public void testIsHeavyAtom() {

    IAtomContainer ac = makeMethaneWithExplicitHydrogens();
    IAtom carbon = ac.getAtom(0);
    IAtom hydrogen = ac.getAtom(1);
    AtomPlacer3D placer = new AtomPlacer3D();
    boolean result = false;
    result = placer.isHeavyAtom(carbon);
    Assert.assertTrue(result);
    result = placer.isHeavyAtom(hydrogen);
    Assert.assertFalse(result);
}