syntax_data: {"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // for each reference transition out of `src_state`...
context_before:             let refs_answer = src_quantifier.apply(
context_after:                 self.src.refs_from(src_state).map(|(src_ref, src_state_prime)| {