|  | // Copyright 2018 The Bazel Authors. All rights reserved. | 
|  | // | 
|  | // Licensed under the Apache License, Version 2.0 (the "License"); | 
|  | // you may not use this file except in compliance with the License. | 
|  | // You may obtain a copy of the License at | 
|  | // | 
|  | //    http://www.apache.org/licenses/LICENSE-2.0 | 
|  | // | 
|  | // Unless required by applicable law or agreed to in writing, software | 
|  | // distributed under the License is distributed on an "AS IS" BASIS, | 
|  | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | 
|  | // See the License for the specific language governing permissions and | 
|  | // limitations under the License. | 
|  | package com.google.devtools.build.lib.syntax; | 
|  |  | 
|  | /** | 
|  | * A marker interface for a {@link ClassObject} whose {@link #getValue} always returns a | 
|  | * Skylark-friendly value, with no defensive conversion required. | 
|  | * | 
|  | * <p>An value is Skylark-friendly if its class (or a supertype) implements | 
|  | * {@link com.google.devtools.build.lib.skylarkinterface.SkylarkValue}, | 
|  | * is annotated with {@link com.google.devtools.build.lib.skylarkinterface.SkylarkModule}, or is a | 
|  | * Skylark primitive like {@link String}. | 
|  | * | 
|  | * <p>Ideally, this class should not be needed, and all {@link ClassObject}s should only expose | 
|  | * Skylark-friendly values. | 
|  | */ | 
|  | public interface SkylarkClassObject extends ClassObject { | 
|  | } |