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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.