syntax_data: {"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"whole_match_span:"}]}
source_snippet:             whole_match_span: Some(rustc_span::Span::default()),
context_before:             match_lint_level: self.hir_id,
context_after:             scrut_span: rustc_span::Span::default(),