Nice work! You're right it's a little difficult to know where to look for the correct information. I had not seen the Steemconnect hosted docs before. I was sure I searched the Github repo for 'reblogged' but perhaps not as I just went back and easily found it in the methods.js file although it easy to get thrown off as the method names are not in camel case.
Thanks for posting this, as interesting as the tutorial is getRebloggedBy() is the way to go!