public boolean noMoreSplits() {
        return remainingTables.isEmpty() && remainingSplits.isEmpty();
    }
Indicates there is no more splits available in this assigner.
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/mysql-cdc/src/main/java/org/apache/inlong/sort/cdc/mysql/source/assigners/MySqlSnapshotSplitAssigner.java