syntax_data: {"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"1"}]}
source_snippet:                 1 + cls[*i + 1..].iter().take_while(|&&c| c == Some(Class::SseUp)).count();
context_before:             let vec_len =
context_after:             *i += vec_len;