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Java utilities, some incorporating modern language features

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/*
 * Copyright 2023 Andrew Bissell. 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.abissell.javautil.rusty;

public /* value */ record None() implements Opt {
    private static final None NONE = new None<>();

    @SuppressWarnings("unchecked")
    static  None none() {
        return (None) NONE;
    }
}