assertEquals("1", p1.get("a"));
assertEquals(Double.valueOf(1), p1.get("b"));
assertEquals("null", p1.get("c"));
assertNull(p1.get("d"));
p1 = GQ.create(p1.toJson());
assertEquals("1", p1.get("a"));
assertEquals(Double.valueOf(1), p1.get("b"));
assertEquals("null", p1.get("c"));
assertNull(p1.get("d"));