syntax_data: {"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"param_env,"}]}
source_snippet:         param_env, specializing_impl_trait_ref, parent_impl_def_id
context_before:         "fulfill_implication({:?}, trait_ref={:?} |- {:?} applies)",
context_after:     );