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Gradle 6.9.1 API redistribution.

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/*
 * Copyright 2018 the original author or 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 org.gradle.internal.snapshot;

/**
 * A snapshot of a part of the file system.
 */
public interface FileSystemSnapshot {
    /**
     * An empty snapshot.
     */
    FileSystemSnapshot EMPTY = new FileSystemSnapshot() {
        @Override
        public void accept(FileSystemSnapshotVisitor visitor) {
        }
    };

    /**
     * Walks the whole hierarchy represented by this snapshot.
     *
     * The walk is depth first.
     */
    void accept(FileSystemSnapshotVisitor visitor);
}