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C Frontend subproject in the Theta model checking framework

There is a newer version: 6.5.2

/*
 *  Copyright 2024 Budapest University of Technology and Economics
 *
 *  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 hu.bme.mit.theta.frontend;

import hu.bme.mit.theta.common.Tuple2;
import hu.bme.mit.theta.core.type.Expr;
import hu.bme.mit.theta.frontend.transformation.model.types.complex.CComplexType;
import org.jetbrains.annotations.NotNull;

import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Optional;

import static com.google.common.base.Preconditions.checkNotNull;

public class FrontendMetadata {
    private final Map> lookupKeyValue;
    private final Map, Integer>, CComplexType> types;

    public FrontendMetadata() {
        this.lookupKeyValue = new LinkedHashMap<>();
        this.types = new LinkedHashMap<>();
    }

    public FrontendMetadata(@NotNull Map> lookupKeyValue) {
        this.lookupKeyValue = new LinkedHashMap<>(lookupKeyValue);
        this.types = new LinkedHashMap<>();
    }

    public  Map lookupMetadata(X owner) {
        return lookupKeyValue.getOrDefault(getHashCode(owner), Map.of());
    }

    public  Optional