{"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"TyBuilder::subst_for_def(db,"}]}
        TyBuilder::subst_for_def(db, def, None).with_data(db.impl_self_ty(def))
    pub fn impl_self_ty(db: &dyn HirDatabase, def: hir_def::ImplId) -> TyBuilder<Binders<Ty>> {
    }