syntax_data: {"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"ty::TraitRef::new_from_args(cx,"}]}
source_snippet:                     ty::TraitRef::new_from_args(cx, did, err_args)
context_before:                     let err_args = GenericArgs::extend_with_error(cx, did, &[self_ty.into()]);
context_after:                 };