It is possible to browse information about a selected entry in the message stack. The Stack menu on the debugger enables you to open a Methods Browser on senders and implementors of the selected method.
The Stack menu also offers options unique to a debugger:
For most methods in a stack, the defining and receiving classes are the same. However, for methods such as CwPushButton(Object)>>#error:, the menu options open browsers on different classes. For this method, Browse Method Class opens on Object, the class named in parentheses. And Browse Receiver Class opens on CwPushButton.