{"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":".filter_map(|variant|"}]}
                .filter_map(|variant| transparent_newtype_field(tcx, variant))
                .iter()
                .any(|field| ty_is_known_nonnull(tcx, typing_env, field.ty(tcx, args), mode))