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Shu Zong Chen committed c72b674

Oops, need to call stub functions while doing recursion

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Files changed (1)

 			return bundle
 		bundle = bundle.union(a)
 		for i in a:
-			bundle = self.ancestors_of(i, bundle)
+			bundle = self._ancestors_of(i, bundle)
 		return bundle
 
 	def ancestors_of(self, target):
 			return bundle
 		bundle = bundle.union(a)
 		for i in a:
-			bundle = self.descendants_of(i, bundle)
+			bundle = self._descendants_of(i, bundle)
 		return bundle
 
 	def descendants_of(self, target):