{"ast_node_type":"other","tokens":[{"end":9,"kind":"keyword","start":0,"text":"where"}]}
    where
    pub(crate) fn each_variant<'s, F>(self, structure: &mut Structure<'s>, f: F) -> TokenStream
        F: for<'v> Fn(DiagnosticDeriveVariantBuilder, &VariantInfo<'v>) -> TokenStream,