syntax_data: {"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"pub(crate)"}]}
source_snippet:     pub(crate) matches_no_values: Option<Span>,
context_before:     #[label(mir_build_unreachable_matches_no_values)]
context_after:     pub(crate) matches_no_values_ty: Ty<'tcx>,