PendingMessagesPagingSource
constructor(totalCountQuery: Query<Long>, pendingCountQuery: Query<Long>, context: CoroutineContext, pendingQueryProvider: (limit: Long, offset: Long) -> Query<RowType>, nonPendingQueryProvider: (limit: Long, offset: Long) -> Query<RowType>, initialOffset: Long = 0, postProcessor: suspend (List<RowType>) -> List<RowType>? = null)