-final class FrontendHistoryMetadataBuilder implements Builder<FrontendHistoryMetadata>,
- Identifiable<LocalHistoryIdentifier> {
-
- private final Map<UnsignedLong, Boolean> closedTransactions;
- private final RangeSet<UnsignedLong> purgedTransactions;
- private final LocalHistoryIdentifier identifier;
+final class FrontendHistoryMetadataBuilder implements Identifiable<LocalHistoryIdentifier> {
+ private final @NonNull Map<UnsignedLong, Boolean> closedTransactions;
+ private final @NonNull MutableUnsignedLongSet purgedTransactions;
+ private final @NonNull LocalHistoryIdentifier identifier;