private List<StreamField> getStreamFields(String groupId, String streamId) {
        List<InlongStreamFieldEntity> fieldEntityList = streamFieldMapper.selectByIdentifier(groupId, streamId);
        if (CollectionUtils.isEmpty(fieldEntityList)) {
            return Collections.emptyList();
        }
        return CommonBeanUtils.copyListProperties(fieldEntityList, StreamField::new);
    }
Query and set the extended information and data source fields of the inlong stream
inlong-manager/manager-service/src/main/java/org/apache/inlong/manager/service/stream/InlongStreamServiceImpl.java