How to migrate Mendix 7.2.1 custom widget to Mendix Studio 8

Dear community, We have some custom widgets on Mendix app store that we build on Mendix Modeler 7.2.1, now we want to use those widgets in Mendix Studio 8 also.  So what will be the steps ?  
1 answers

Just test them, they might work.

If you have deprecation warning on 7 it likely it wont work on 8, so fix them first

If you input widget you might want to have a look at the pluggable widget API.

Cheers, Andries