1.40.7 ContextPart: enumerating

scanBacktraceFor: selectors do: aBlock

Scan the backtrace for contexts whose selector is among those listed in selectors; if one is found, invoke aBlock passing the context.

scanBacktraceForAttribute: selector do: aBlock

Scan the backtrace for contexts which have the attribute selector listed in selectors; if one is found, invoke aBlock passing the context and the attribute.