{"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"&*self.arena.alloc(self.ty(constraint.span,"}]}
                        &*self.arena.alloc(self.ty(constraint.span, hir::TyKind::Err(guar)));
                    let err_ty =
                    hir::AssocItemConstraintKind::Equality { term: err_ty.into() }