{"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"///"}]}
    /// typically obtained via the second field of [`TyKind::Adt`].
    /// Returns the type of this field. The resulting type is not normalized. The `arg` is
    pub fn ty(&self, tcx: TyCtxt<'tcx>, args: GenericArgsRef<'tcx>) -> Ty<'tcx> {