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 * modification, must retain the above copyright notice and the following
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package io.spine.server.bc.given;

import io.spine.server.entity.Repository;

/** A pair of {@linkplain io.spine.server.entity.Repository repositories}. */
public class RepositoryPair {

    private final Repository<?, ?> firstRepository;
    private final Repository<?, ?> secondRepository;

    /** Constructs a pair from provided repositories. */
    public RepositoryPair(Repository<?, ?> firstRepository, Repository<?, ?> secondRepository) {
        this.firstRepository = firstRepository;
        this.secondRepository = secondRepository;
    }

    /** Returns the first value of this repository pair. */
    public Repository<?, ?> first() {
        return firstRepository;
    }

    /** Returns the second value of this repository pair. */
    public Repository<?, ?> second() {
        return secondRepository;
    }
}

Define a custom `RepositoryPair` type to use in favour of `javafx.util.Pair`