{"ast_node_type":"variable","tokens":[{"end":56,"kind":"keyword","start":0,"text":"let"}]}
        let candidate = Self::for_name_ref(field_name)?;
    pub fn for_field_name(field_name: &ast::NameRef) -> Option<ast::RecordExprField> {
        if candidate.field_name().as_ref() == Some(field_name) { Some(candidate) } else { None }