Getting Key from keyBy() in ProcessFunction

[Jürgen Thomann]

Hi,

I'm currently using a ProcessFunction after a keyBy() and can't find a 
way to get the key. I'm currently storing it in a ValueState<String> 
within processElement and set it all the time, so that I can access it 
in onTimer(). Is there a better way to get the key? We are using Flink 
1.3 at the moment.

Best,
Jürgen