### Question:
IntStep implements Streamable<Integer>, IntUnaryOperator { public static IntStep of(int size) { return new IntStep(size, 0); } private  IntStep(int size, int start); static IntStep step(int size); static IntStep step(Size size); static IntStep step(Size size, From from); static IntStep step(int size, From from); static IntStep of(int size); static IntStep of(Size size); static IntStep of(Size size, From from); static IntStep of(int size, From from); static Size size(int size); static From startAt(int start); static From from(int start); IntStreamPlus intStream(); @Override StreamPlus<Integer> stream(); @Override int applyAsInt(int operand); Func1<Integer, Integer> function();  }### Answer:
@Test public void testAsStream() { assertEquals("[0, 7, 14, 21, 28, 35, 42, 49, 56, 63]", IntStep.of(7).limit(10).toList().toString()); }