syntax_data: {"ast_node_type":"function","tokens":[{"end":38,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn def_id(&self) -> I::DefId {
context_before: impl<I: Interner> ty::Binder<I, ExistentialTraitRef<I>> {
context_after:         self.skip_binder().def_id