syntax_data: {"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"hi.update(new_file_and_idx,"}]}
source_snippet:                     hi.update(new_file_and_idx, span_data.hi, self.time_stamp);
context_before:                     let hi = &mut self.line_cache[next_oldest];
context_after:                     (oldest, next_oldest)