VPackBuilder builder = new VPackBuilder();
  builder.add(ValueType.OBJECT); // object start
  builder.add("foo", "bar"); // add field "foo" with value "bar"
  builder.close(); // object end
  VPackSlice slice = builder.slice(); // create slice

  VPackSlice slice = ...
  int size = slice.size(); // number of fields
  VPackSlice foo = slice.get("foo"); // get field "foo"
  String value = foo.getAsString(); // get value from "foo"
  // iterate over the fields
  for (final Iterator<Entry<String, VPackSlice>> iterator = slice.objectIterator(); iterator.hasNext();) {
    Entry<String, VPackSlice> field = iterator.next();
    ...
  }

  VPackBuilder builder = new VPackBuilder();
  builder.add(ValueType.ARRAY); // array start
  builder.add(1); // add value 1
  builder.add(2); // add value 2
  builder.add(3); // add value 3
  builder.close(); // array end
  VPackSlice slice = builder.slice(); // create slice

  VPackSlice slice = ...
  int size = slice.size(); // number of values
  // iterate over values
  for (int i = 0; i < slice.size(); i++) {
    VPackSlice value = slice.get(i);
    ...
  }
  // iterate over values with Iterator
  for (final Iterator<VPackSlice> iterator = slice.arrayIterator(); iterator.hasNext();) {
    VPackSlice value = iterator.next();
    ...
  }

  VPackBuilder builder = new VPackBuilder();
  builder.add(ValueType.OBJECT); // object start
  builder.add("foo", ValueType.OBJECT); // add object in field "foo"
  builder.add("bar", 1); // add field "bar" with value 1 to object "foo"
  builder.close(); // object "foo" end
  builder.close(); // object end
  VPackSlice slice = builder.slice(); // create slice