API changes in AEM 5.6

Question

Hi All,      
Is CQ Providing any documentation related to API changes from previous versions of CQ - CQ 5.6.
Example:
[1]
com.day.cq.workflow
[2]
com.adobe.granite.workflow
API [1] has been replaced with [2] in AEM 5.6.
Thanks
Siva

Answer 1

I've found the following link which has the API differences b/t CQ5.5 & 5.6
http://dev.day.com/docs/en/cq/current/diff-previous/changes.html
The above has list of APIs which are removed, added & changed.  But my concern is, we have developed few workflows in CQ 5.5 and now we are migrating to CQ 5.6.
Example 1:
[1] com.day.cq.workflow.WorkflowSession;
[2] com.adobe.granite.workflow.WorkflowSession;
Document says, [1] has been replaced with [2] in 5.6.    But still [1] works in 5.6. If I go for update [1] with [2]: getSession() method is removed in 5.6 version.. which I've used in several places in the CQ5.5 workflow process.
How can I get JCR Session in the workflow + CQ5.6.. I need to check how we can get jcr session in 5.6.
Example 2:
[1] com.day.cq.workflow.exec.ParticipantStepChooser;
[2] com.adobe.granite.workflow.exec.ParticipantStepChooser;
In this case Participant chooser will not work, If I don't update [1] with [2] in 5.6.
So what's the best approach to migrate?
Thanks
Siva