code: public void assertContainsOnly(Description description, byte[] actual, byte[] values) {
      arrays.assertContainsOnly(description, actual, values);
    }
docs: Asserts that the given array contains only the given values and nothing else, in any order.
  
  @param description contains information about the assertion.
  @param actual the given array.
  @param values the values that are expected to be in the given array.
  @throws NullPointerException if the array of values is {@code null}.
  @throws IllegalArgumentException if the array of values is empty.
  @throws AssertionError if the given array is {@code null}.
  @throws AssertionError if the given array does not contain the given values or if the given array contains values
  that are not in the given array.