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Closure Compiler is a JavaScript optimizing compiler. It parses your JavaScript, analyzes it, removes dead code and rewrites and minimizes what's left. It also checks syntax, variable references, and types, and warns about common JavaScript pitfalls. It is used in many of Google's JavaScript apps, including Gmail, Google Web Search, Google Maps, and Google Docs.

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/*
 * Copyright 2008 The Closure Compiler Authors.
 *
 * 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.javascript.jscomp;

import com.google.common.collect.ImmutableList;
import com.google.javascript.jscomp.JsMessage.IdGenerator;
import org.jspecify.nullness.Nullable;

/**
 * An implementation of MessageBundle that has no translations.
 */
public final class EmptyMessageBundle implements MessageBundle {

  /** Gets a dummy message ID generator. */
  @Override
  public @Nullable IdGenerator idGenerator() {
    return null;
  }

  /** Returns null, to indicate it has no message replacements. */
  @Override
  public @Nullable JsMessage getMessage(String id) {
    return null;
  }

  /** Returns an empty list of messages. */
  @Override
  public ImmutableList getAllMessages() {
    return ImmutableList.of();
  }
}