syntax_data: {"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"self.expand_opaque_ty(def_id,"}]}
source_snippet:             self.expand_opaque_ty(def_id, args).unwrap_or(t)
context_before:         if let ty::Alias(ty::Opaque, ty::AliasTy { def_id, args, .. }) = *t.kind() {
context_after:         } else if t.has_opaque_types() {