There were two methods marked [Abstract] which was incorrect. As such the whole NSTextAttachmentCell class was generated as abstract, meaning it was only usable if subclassed, which is not the case in Objective-C. As in Objective-C, the following is now supported: new NSTextAttachmentCell (new NSImage (...))
This returns a proxy to a remote object, so we'll generally want it to return a binding typed as the remote object's interface. Runtime.GetNSObject sends the "class" message to determine the type of binding to create, but that always returns NSDistantObject in this case, so bypass it and explicitly create the type of binding we want.
…ure and add Selector.Autorelease[Handle].