Declare a method prototype for a less formal delegate method that is relied upon by IMBNodeViewController. Quiets a warning about an unrecognized @selector.
Declare as nonatomic those properties that are synthesized but half-overridden by manual accessors. These methods are not truly atomic, I think, because of the nature of their manual accessors. I think to fully manually implement them as atomic would be some work, so I'm hoping that the right way to interpret these properties is that they should have been declared nonatomic (like most if not all properties) before, and it's a coincidence that they were declared implicitly atomic.
Remove wiring to evidently obsolete showPopover: method. I believe whatever conveyance of information that was being achieved by this is now happening through other channels.
Quiet warning about missing accessor setImb_Appearance by importing IMBTableView.h