[galaxyLogic]

I worked with Visual Smalltalk for years and early on I created my own tool which found all methods whose source-code contained a given string or string with wild-cards. It was surprisingly effective because it easily integrated into the Smalltalk browser-windows in general so rather than printing out the set of methods found it opened a list-browser with all the found methods in it, so I could then easily browse for their senders or methods called in them and so on.

So how did you know what to search for? A simple case was to look up the ready-built application's GUI which usually always contains some strings. So if you wanted to change something in the system which would result in a change to its GUI just search for source-code with some of the words you saw in the GUI.