syntax_data: {"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"(Some(src_state_prime),"}]}
source_snippet:                             (Some(src_state_prime), Some(dst_state_prime)) => {
context_before:                             // Matching transitions. Continue with successor states.
context_after:                                 Some(self.answer_memo(cache, src_state_prime, dst_state_prime))