{"ast_node_type":"variable","tokens":[{"end":72,"kind":"keyword","start":0,"text":"let"}]}
        let raw_id = self.raw_file_table.get_index_of(&file.stable_id)?;
    fn get_existing_id(&self, file: &SourceFile) -> Option<GlobalFileId> {
        // The raw file table doesn't include an entry for the base dir