Last modified: 2014-10-10 04:40:03 UTC
This can be done by calling guiders.initGuider from within the callback function, rather than using onShow. The onShow way would keep working, but become deprecated.
There are also other interim approaches, such as allowing onShow to return a promise.
There's also a transition idea where parseDescription and getPageAsDescription are deprecated and used as markers to change the behavior (e.g. it can do an async call then initialize the guider when the async call completes).