[feature] uid_in query with QueryWithVars

Hello digger from the future.
The best you can do to workaround this is

query query($uids: string = "[0x1d, 0x1e, 0x20, 0x21]") {
   
  Uvar as (func: uid($uids))

  query(func: has(follows)) @cascade
    {
    uid
      follows @filter(uid_in(~follows, uid(Uvar))) 
      {
        uid
      }
  }
}

Multiple blocks and use uid()