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package hydra.tools;

import java.util.Objects;
import java.util.function.Function;

@FunctionalInterface
public interface Function4 {

    R apply(A a, B b, C c, D d);

    default  Function4 andThen(Function after) {
        Objects.requireNonNull(after);
        return (A a, B b, C c, D d) -> after.apply(apply(a, b, c, d));
    }
}