NullNode extends AbstractJsonNode implements IPrimitiveNode { public static NullNode getInstance() { return Instance; } NullNode(); @Override void appendAsString(final Appendable sb); @Override void clear(); @Override NullNode clone(); @Override int compareToSameType(final IJsonNode other); @Override void copyValueFrom(final IJsonNode otherNode); @Override boolean equals(final Object o); @Override Class<NullNode> getType(); @Override int hashCode(); static NullNode getInstance();  }
@Test public void shouldBeEqual() { Assert.assertEquals(NullNode.getInstance(), NullNode.getInstance()); }