{"ast_node_type":"other","tokens":[{"end":42,"kind":"keyword","start":0,"text":"fmt::from_fn(move"}]}
        fmt::from_fn(move |f| match self {
    fn debug_truncated(&self) -> impl fmt::Debug {
            Self::Binder { bound_vars, scope_type, hir_id, where_bound_origin, s: _ } => f