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