Transformer模块能否让业务以自定义jar包的形式

如题，因为部分场景的transformer处理逻辑内部需要到外部系统获取远程数据，比如通过http或者dubbo rpc等，这种需要依赖外部的jar包，需要充分自定义获取的数据和转换逻辑，请问这种场景能支持么？

Start by reviewing the Transformer module and its extension points, then trace how transformer logic is loaded and run. Check whether a custom JAR can safely bring dependencies such as HTTP or Dubbo RPC. Done means the supported packaging and dependency model are documented and the requested external-data transformation scenario is demonstrably supported.

Written by the indexing model from the issue text.