syntax_data: {"ast_node_type":"other","tokens":[{"end":45,"kind":"keyword","start":0,"text":"self.cfg.start_new_block().unit()"}]}
source_snippet:             self.cfg.start_new_block().unit()
context_before:             self.cfg.terminate(block, source_info, TerminatorKind::Unreachable);
context_after:         } else {