syntax_data: {"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // for a "backedge" -- this result *is* the backedge).
context_before:         // cache (which is meant for things that have completed but
context_after:         if let Some(cycle_result) = self.check_evaluation_cycle(&stack) {