syntax_data: {"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// `ty.try_super_fold_with(self)`, but any other folding should be done
context_before:     /// For example, in `MyFolder::try_fold_ty(ty)`, it is valid to call
context_after:     /// with `xyz.try_fold_with(self)`.