@Override
        public void serialize(
            final StorageDataComplexObject value,
            final JsonGenerator gen,
            final SerializerProvider provider)
            throws IOException {
            gen.writeString(value.toStorageData());
        }
Initialize the object based on the given source.
oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/storage/type/StorageDataComplexObject.java