### Question:
JsonNodeMarshaller implements TypeMarshaller<JsonNode> { @Override public JsonNode fromBytes(byte[] bytes) throws Exception { return fromLexBytes(bytes); } JsonNodeMarshaller(); @Override JsonNode fromBytes(byte[] bytes); @Override byte[] toBytes(JsonNode t); @Override JsonNode fromLexBytes(byte[] lexBytes); @Override byte[] toLexBytes(JsonNode t);  }### Answer:
@Test public void testMarshaller_null() throws Exception { JsonNodeMarshaller jsonNodeMarshaller = new JsonNodeMarshaller(); JsonNode jsonNode = jsonNodeMarshaller.fromBytes(null); Assert.assertNull(jsonNode, " marshalled object from null bytes is null"); }