@Override
        public Class<? extends StorageBuilder> builderOf(final Class<? extends StorageData> dataType,
                                                         final Class<? extends StorageBuilder> defaultBuilder) {
            return defaultBuilder;
        }
The default storage builder. Use {@link StorageBuilder} to provide general suitable entity builder
implementation, which deliver {@link HashMap} to storage module implementation.
oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/storage/StorageBuilderFactory.java