syntax_data: {"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"candidate.pre_binding_block"}]}
source_snippet:             candidate.pre_binding_block = Some(next_block);
context_before:             let next_block = self.cfg.start_new_block();
context_after:             candidate.otherwise_block = Some(next_block);