public OAuth2TokenDescriptorBuilder scope(Iterable<String> scope) {
        this.scope.addAll(requireNonNull(scope, "scope"));
        return this;
    }
{@code scope} Token Introspection Response field,
OPTIONAL. An {@link Iterable} of individual scope values.
oauth2/src/main/java/com/linecorp/armeria/common/auth/oauth2/OAuth2TokenDescriptorBuilder.java