{"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"ExprKind::MethodCall(_,"}]}
            ExprKind::MethodCall(_, receiver, _, _)
            // (fn_ptr as *<const/mut> <ty>).is_null()
                if let Some(def_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id)