docs: def prefetchDeclarativeIds(Declarative, count) -> Optional[Iterable[int]]:
      """ Prefetch Declarative IDs
  
      This function prefetches a chunk of IDs from a database sequence.
      Doing this allows us to preallocate the IDs before an insert, which significantly
      speeds up :
  
      * Orm inserts, especially those using inheritance
      * When we need the ID to assign it to a related object that we're also inserting.
  
      :param Declarative: The SQLAlchemy declarative class.
          (The class that inherits from DeclarativeBase)
  
      :param count: The number of IDs to prefetch
  
      :return: An iterable that dispenses the new IDs
      """
      return _commonPrefetchDeclarativeIds(
          getDbEngine(), _sequenceMutex, Declarative, count
      )