{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"self.tcx.upvars_mentioned(closure_def_id.expect_local()).is_some()"}]}
                    self.tcx.upvars_mentioned(closure_def_id.expect_local()).is_some()
                if let &ty::Closure(closure_def_id, _args) = ty.kind() {
                } else {