{"ast_node_type":"variable","tokens":[{"end":85,"kind":"keyword","start":0,"text":"if"}]}
                        if let hir::ExprKind::MethodCall(_, rcvr, _, _) = expr.kind {
                    fn visit_expr(&mut self, expr: &'tcx hir::Expr<'tcx>) {
                            if self.span == rcvr.span.source_callsite() {