Cannot multi- order ParseQuery with ascending and descending keys with "createdAt"

[fahadzafar]

So trying to sort Ascending w.r.t createdAt but Descending wtr ANOTHER_KEY.

now if i call parseQuery.orderByDescending("createdAt,ANOTHER_KEY"), everything is fine, but if i do
parseQuery.orderByDescending("ANOTHER_KEY"),
parseQuery.addOrderByAscending("createdAt")

it throws a parse exception from the parseserver saying createdAt is not a valid order key.

I looked at the source, for the REST api, you simply add the key with a '-' sign for descending so why is this happening ?