@Override
    public <VR> KTable<K, VR> transformValues(final ValueTransformerWithKeySupplier<? super K, ? super V, ? extends VR> transformerSupplier,
                                              final Materialized<K, VR, KeyValueStore<Bytes, byte[]>> materialized,
                                              final String... stateStoreNames) {
        return transformValues(transformerSupplier, materialized, NamedInternal.empty(), stateStoreNames);
    }
The implementation class of {@link KTable}.

@param <K> the key type
@param <S> the source's (parent's) value type
@param <V> the value type
streams/src/main/java/org/apache/kafka/streams/kstream/internals/KTableImpl.java