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// Copyright 2015 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.skylarkinterface;
/**
* Java objects that are also Skylark values.
*
* <p>This is used for extending the Skylark interpreter with domain-specific values.
*/
public interface SkylarkValue extends SkylarkPrintable {
/**
* Returns if the value is immutable and thus suitable for being used as a dictionary key.
*
* <p>Immutability is deep, i.e. in order for a value to be immutable, all values it is composed
* of must be immutable, too.
*/
default boolean isImmutable() {
return false;
}
}
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