syntax_data: {"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"Some(\"0\")"}]}
source_snippet:             Some("0") | Some("none") => *slot = DebugInfo::None,
context_before:         match v {
context_after:             Some("line-directives-only") => *slot = DebugInfo::LineDirectivesOnly,