syntax_data: {"ast_node_type":"other","tokens":[{"end":30,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // #91445 for details.
context_before:         // but this code path isn't hot enough for it to be worth it. See
context_after:         let (idx, is_new) = inner.byte_strs.insert_full(byte_str);