Ignoring element in stream

[hamid512]

how i prevent sending empty string '' if number is odd, like prevent .to from running and just move to next stream data? if defeats the purpose of multiple branching topics for me
my code

`const checkforOdd = (kafkaMessage) => {
const value = kafkaMessage.value.toString("utf8");
// console.log(value)
if(!(parseInt(value) % 2 == 0)){
return value
}else{
return ''
}

};
const checkforEven = (kafkaMessage) => {
const value = kafkaMessage.value.toString("utf8");
if(parseInt(value) % 2 == 0){

    return value
 }
 else{
      return ''
 }

};

const kafkaStreams = new KafkaStreams(config);

kafkaStreams.on("error", (error) => {
console.log("Error occured:", error.message);
});

const stream = kafkaStreams.getKStream('test-topic');
const [one$, two$] = stream
.branch([() => true, () => true]);

const producerPromiseOne = one$
.map(checkforOdd)
.to("odd");

const producerPromiseTwo = two$
.map(checkforEven)
.to("even");`

[hamid512]

@rsilvestre @elmarx @crcastle @drublic