syntax_data: {"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"pub(crate)"}]}
source_snippet:     pub(crate) covered_by_many: Option<MultiSpan>,
context_before:     #[note(mir_build_unreachable_covered_by_many)]
context_after:     pub(crate) covered_by_many_n_more_count: usize,