Hi. How can I use the "BigQuery (denormalized typed struct)" destination, are there any docs(except the general docs on BigQuery dest.)? My issue is it doesn't make a correct schema(for a field which is an object) for BigQuery I guess, from logs:

BigQueryError{reason=invalid, location=null, message=Error while reading data, error message: JSON parsing error in row starting at position 0: JSON object specified for non-record field: meta}

I thought this destination transforms all the fields to their corresponding JSON structs or primitives. My source is MongoDB.