syntax_data: {"ast_node_type":"other","tokens":[{"end":42,"kind":"keyword","start":0,"text":"hi.touch(self.time_stamp);"}]}
source_snippet:                 hi.touch(self.time_stamp);
context_before:                 let hi = &mut self.line_cache[hi_cache_idx as usize];
context_after:                 (oldest, hi_cache_idx as usize)