syntax_data: {"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"ExistentialPredicate::AutoTrait(did)"}]}
source_snippet:             ExistentialPredicate::AutoTrait(did) => Some(did),
context_before:         self.iter().filter_map(|predicate| match predicate.skip_binder() {
context_after:             _ => None,