syntax_data: {"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"UnwindAction::Unreachable"}]}
source_snippet:                 UnwindAction::Unreachable => elaborator.patch.unreachable_cleanup_block(),
context_before:                 UnwindAction::Continue => elaborator.patch.resume_block(),
context_after:                 UnwindAction::Terminate(reason) => elaborator.patch.terminate_block(reason),