@Test
 public void testComplexSerialization() throws Exception {
   try (ChronicleMap<String, A> map =
       ChronicleMapBuilder.of(String.class, A.class)
           .valueMarshaller(AMarshaller.INSTANCE)
           .entries(5)
           .averageKeySize(4)
           .averageValueSize(1000)
           .create()) {
     A obj_A = new A();
     obj_A.str_ = "a";
     obj_A.list_ = new ArrayList<>();
     B b = new B();
     b.str_ = "b";
     obj_A.list_.add(b);
     map.put("KEY1", obj_A);
     map.get("KEY1");
   }
 }