syntax_data: {"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"MaybeReachable::Reachable(set)"}]}
source_snippet:             MaybeReachable::Reachable(set) => set.gen_(elem),
context_before:             MaybeReachable::Unreachable => {}
context_after:         }