There are places where Woopsi's API is inconsistent. I've opened a SourceForge bug for this:
https://sourceforge.net/tracker/index.php?func=detail&aid=2051122&group_id=207650&atid=1002530The two I've identified so far are inconsistent capitalisation of "Textbox" and "CheckBox" (etc) and the use of both "gadgets" and "children" when working with the child gadget list (ie. "shelveChild()" and "swapGadgetDepth()").
Have you spotted any others?