syntax_data: {"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"iter::zip(obligation_args.iter(),"}]}
source_snippet:         iter::zip(obligation_args.iter(), impl_args.iter()).all(|(obl, imp)| {
context_before:         // increments the depth for us.
context_after:             match (obl.kind(), imp.kind()) {