How to store spark dataframe as ELWC tfrecord?

[ZhouM1118]

My team uses spark for data preprocessing, and now I need to store the dataframe in spark in HDFS in tfrecord format of ELWC, we use writeDF.write.mode(writeMode).format("tfrecord").option("recordType", "Example") to save dataframe as tfrecord format, but it only support Example or SequenceExample tfrecord format, so how to store spark dataframe as ELWC tfrecord? Thank you for your help！