Join two data streams on a given key and diffrent common window size.

[lehaxing]

hi all, flink 1.4 or 1.5 only support Join two data streams  as shown below：




but i have two data streams A and B, i want make A and B each set its own 
window size， not a common size；
if can do this ,i can join A (window size:1min , TumblingEventTimeWindow) and B 
(window size:5min，SlidingEventTimeWindow);
Why doesn't flink support this?  I found a similar example on github ( 
https://github.com/wangyangjun/flink-stream-join),like this：