{"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"//"}]}
                    // So peel off one-level, turning the &T into T.
                    // but what we want here is the type of the underlying value being borrowed.
                    match self.cx.structurally_resolve_type(pat.span, base_ty).builtin_deref(false)