public static <K, V> Produced<K, V> as(final String processorName) {
        return new Produced<>(null, null, null, processorName);
    }
Create an instance of {@link Produced} with provided processor name.

@param processorName the processor name to be used. If {@code null} a default processor name will be generated
@param <K>         key type
@param <V>         value type
@return a new instance of {@link Produced}
streams/src/main/java/org/apache/kafka/streams/kstream/Produced.java