{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"*self.created_files.entry(cache_key).or_insert_with(||"}]}
        *self.created_files.entry(cache_key).or_insert_with(|| {
        let cache_key = (source_file.stable_id, source_file.src_hash);
            let line_program: &mut LineProgram = &mut self.dwarf.unit.line_program;