protected final FixedKeyProcessorContext<KIn, VOut> context() {
        return context;
    }
Get the processor's context set during {@link #init(FixedKeyProcessorContext) initialization}.

@return the processor context; null only when called prior to {@link #init(FixedKeyProcessorContext) initialization}.
streams/src/main/java/org/apache/kafka/streams/processor/api/ContextualFixedKeyProcessor.java