syntax_data: {"ast_node_type":"other","tokens":[{"end":38,"kind":"keyword","start":0,"text":")"}]}
source_snippet: ) -> RelateResult<I, I::GenericArgs> {
context_before:     b_arg: I::GenericArgs,
context_after:     relation.cx().mk_args_from_iter(iter::zip(a_arg.iter(), b_arg.iter()).map(|(a, b)| {