{"ast_node_type":"function","tokens":[{"end":95,"kind":"keyword","start":0,"text":"pub"}]}
    pub fn at_first_file(db: &'db ide_db::RootDatabase) -> Result<MatchFinder<'db>, SsrError> {
    /// Constructs an instance using the start of the first file in `db` as the lookup context.
        if let Some(first_file_id) = db