syntax_data: {"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"ExistentialPredicate::Trait(tr)"}]}
source_snippet:             ExistentialPredicate::Trait(tr) => self.rebind(tr).with_self_ty(cx, self_ty).upcast(cx),
context_before:         match self.skip_binder() {
context_after:             ExistentialPredicate::Projection(p) => {