syntax_data: {"ast_node_type":"other","tokens":[{"end":42,"kind":"keyword","start":0,"text":"debug_assert!(len"}]}
source_snippet:             debug_assert!(len <= MAX_LEN);
context_before:             let len = (self.len_with_tag_or_marker & !PARENT_TAG) as u32;
context_after:             lo == 0 && len == 0