I had plans to build a panel that provided to ability to collapse it's contents. Since I was using Twitter Bootstrap, I figured I would create another Module for the Dojo Bootstrap that was similar in functionality to the Collapse module. Before I started coding, I figured I should try the Collapse module itself to see if already provided what I needed.
Lo and Behold! It did! Below is the sample code.
Note: the code uses the DojoBootstrap version of Collapse and is loaded remotedly via AMD.