public final boolean isSnapshotSplit() {
        return getClass() == SnapshotSplit.class || getClass() == SchemalessSnapshotSplit.class;
    }
Checks whether this split is a snapshot split.
inlong-sort/sort-flink/cdc-base/src/main/java/org/apache/inlong/sort/cdc/base/source/meta/split/SourceSplitBase.java