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addReadOnlyStateStore(final StoreBuilder<?> storeBuilder,
                      final String sourceName,
                      final TimestampExtractor timestampExtractor,
                      final Deserializer<KIn> keyDeserializer,
                      final Deserializer<VIn> valueDeserializer,
                      final String topic,
                      final String processorName,
                      final ProcessorSupplier<KIn, VIn, Void, Void> stateUpdateSupplier)

The method signature is aligned with the one for adding global state stores. Similarly, there is an overloaded method which doesn't take the TimestampExtractor:

addReadOnlyStateStore(final StoreBuilder<?> storeBuilder,
                      final String sourceName timestampExtractor,
                      final Deserializer<KIn> keyDeserializer,
                      final Deserializer<VIn> valueDeserializer,
                      final String topic,
                      final String processorName,
                      final ProcessorSupplier<KIn, VIn, Void, Void> stateUpdateSupplier)

This method The first method would be a wrapper around the following calls:

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