syntax_data: {"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"(ty::UnsafeBinder(a_binder),"}]}
source_snippet:         (ty::UnsafeBinder(a_binder), ty::UnsafeBinder(b_binder)) => {
context_after:             Ok(Ty::new_unsafe_binder(cx, relation.binders(*a_binder, *b_binder)?))