syntax_data: {"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"relation.relate(ep_a.rebind(a),"}]}
source_snippet:                         relation.relate(ep_a.rebind(a), ep_b.rebind(b))?.skip_binder(),
context_before:                     Ok(ep_a.rebind(ty::ExistentialPredicate::Trait(
context_after:                     )))