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UtilsForCollections.java

public static <T> Set<T> toSet(T[] array) {
    return UtilsForCollections.toSet(array, false);
}
public static <T> Set<T> toSet(T[] array, boolean preserveOrder) {
    if (preserveOrder) {
        return Arrays.stream(array)
          .collect(Collectors.toCollection(LinkedHashSet::new));
    }
    return Arrays.stream(array).collect(Collectors.toSet());
}