syntax_data: {"ast_node_type":"other","tokens":[{"end":48,"kind":"keyword","start":0,"text":"impl_def_id,"}]}
source_snippet:             impl_def_id, self_ty, impl_trait_ref
context_before:             "default_print_impl_path: impl_def_id={:?}, self_ty={}, impl_trait_ref={:?}",
context_after:         );