{"ast_node_type":"variable","tokens":[{"end":63,"kind":"keyword","start":0,"text":"if"}]}
                if let Some(local_def_id) = def_id.as_local() {
                // https://github.com/rust-lang/project-rfc-2229/issues/46
                    let captures = self.ecx.tcx.closure_captures(local_def_id);