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@PublicEvolving
public interface SourceReader<T, SplitT extends SourceSplit>
        extends AutoCloseable, CheckpointListener, CheckpointAvailabilityProvider {
	/**
     * This method has a default implementation of returning SNAPSHOT_AVAILABLE, which means that
     * the default behavior is to take a snapshot under any scenario.
     */
    @Override
    default SnapshotAvailability isSnapshotAvailable(long checkpointID) {
        return SnapshotAvailability.AVAILABLE;
    }
}