{"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"for"}]}
    for field in structure.variants().iter().flat_map(|v| v.ast().fields.iter()) {
    // FIXME: We can't identify variables in a subdiagnostic
        for attr_name in field.attrs.iter().filter_map(|at| at.path().get_ident()) {