syntax_data: {"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"(MaybeReachable::Unreachable,"}]}
source_snippet:             (MaybeReachable::Unreachable, MaybeReachable::Reachable(set)) => {
context_before:             (MaybeReachable::Unreachable, MaybeReachable::Unreachable) => Ok(()),
context_after:                 write!(f, "\u{001f}+")?;