syntax_data: {"ast_node_type":"other","tokens":[{"end":29,"kind":"keyword","start":0,"text":"}"}]}
source_snippet:                             }
context_before:                                 self.evaluate_predicates_recursively(previous_stack, nested)
context_after:                             Err(effects::EvaluationFailure::Ambiguous) => Ok(EvaluatedToAmbig),