syntax_data: {"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"_"}]}
source_snippet:         _ => unicode_width::UnicodeWidthChar::width(ch).unwrap_or(1),
context_before:         | '\u{2067}' | '\u{2068}' | '\u{202C}' | '\u{2069}' => 1,
context_after:     }