makes sure not to reference deleted folders as parents (#4364)
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@ -89,7 +89,8 @@ class Folder(Container):
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for id, item in self.contentItems():
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if not ILink.providedBy(item):
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continue
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parents.append(item.folder.to_object)
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if item.folder.to_object:
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parents.append(item.folder.to_object)
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return parents
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def child_folders_brains(self):
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