{"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"source_ty.builtin_deref(true).map(|t|"}]}
                    source_ty.builtin_deref(true).map(|t| t.kind()),
                let may_involve_vtable = match (
                    target_ty.builtin_deref(true).map(|t| t.kind()),