### Question:
BulldogUtil { public static void sleepNs(int ns) { long start = System.nanoTime(); long end = 0; do { end = System.nanoTime(); } while(start + ns >= end); }  static void sleepMs(int ms); static void sleepNs(int ns); static String bytesToString(byte[] bytes, String encoding); static String bytesToString(byte[] bytes); @SuppressWarnings("resource") static String convertStreamToString(java.io.InputStream is); static String readFileAsString(String path); static boolean isStringNumeric(String str); static final int getUnsignedByte(byte b);  }### Answer:
@Test public void testSleepNs() { }