momo-jun commented on code in PR #16816:
URL: https://github.com/apache/pulsar/pull/16816#discussion_r930955198


##########
site2/docs/functions-develop-api.md:
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@@ -102,6 +102,13 @@ public class ExclamationFunction implements 
Function<String, String> {
 
 For more details, see [code 
example](https://github.com/apache/pulsar/blob/master/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/ExclamationFunction.java).
 
+:::note
+
+The return type of the `Function` can be wrapped in a Pulsar `Record` generic 
which gives more control on the output message (topic, schema, properties, ...)
+You can use the `Context::newOutputRecordBuilder` method to build this 
`Record` output.

Review Comment:
   Does it make sense to provide at least an example to show users how to use 
this method and what they can get?



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