No working examples of Custom expectations on Spark

Hi All,

I have observed that there are no working examples of custom expectations (Created locally and not submitted) for Spark.
For Pandas it is easy you can do ge.from_pandas and can give the custom class there. SAme cannot be done for Spark.

There is thid doc : How to create custom Expectations for Spark

However as soon as you add the following to the datasource config

module_name: my_custom_expectations
class_name: CustomSparkDFDataset

it fails, it does not recognize data asset type.

Could someone please help urgently.