syntax_data: {"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"//"}]}
source_snippet: // `MAX_LEN` is chosen so that `PARENT_TAG | MAX_LEN` is distinct from
context_after: // `BASE_LEN_INTERNED_MARKER`. (If `MAX_LEN` was 1 higher, this wouldn't be true.)