syntax_data: {"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"debug!(\"bind_and_guard_matched_candidate(subbranch={:?})\","}]}
source_snippet:         debug!("bind_and_guard_matched_candidate(subbranch={:?})", sub_branch);
context_before:     ) -> BasicBlock {