Apache Fink - Adding/Removing KeyedStreams at run time without stopping the application

[M Singh]

Hi Folks:
I am working on an exploratory project in which I would like to add/remove 
KeyedStreams 
(https://nightlies.apache.org/flink/flink-docs-master/docs/dev/datastream/operators/overview/#keyby)
 without restarting the Flink streaming application.
Is it possible natively in Apache Flink ?  If not, is there any 
framework/pattern which can be used to implement this without restarting the 
application/changing the code ?
Thanks