ordinal/src/org/immutables/ordinal/ImmutableOrdinalSet.java
public static <E extends OrdinalValue<E>> ImmutableOrdinalSet<E> copyOf(E[] elements) {
    return constructFromArray(elements);
  }
public static <E extends OrdinalValue<E>> ImmutableOrdinalSet<E> copyOf(E[] elements) {
    return constructFromArray(elements);
  }
Creates immutable ordinal set from array of elements.
All elements expected to have same {@link OrdinalValue#domain()} as the first element,
otherwise exception will be thrown.
@param <E> the element type
@param elements the elements, no nulls allowed
@return the immutable ordinal set