SomeCheckedException cause = new SomeCheckedException();
    SomeChainingException exception = new SomeChainingException(cause);
    assertSame(cause, getRootCause(exception));
  }

  public void testGetRootCause_doubleWrapped() {
    SomeCheckedException cause = new SomeCheckedException();
    SomeChainingException exception = new SomeChainingException(new SomeChainingException(cause));
    assertSame(cause, getRootCause(exception));
  }

  static final class YetAnotherCheckedException extends Exception {}

  static final class SomeUncheckedException extends RuntimeException {}

  static final class SomeChainingException extends RuntimeException {
    public SomeChainingException(Throwable cause) {
      super(cause);
    }
  }

  private TestExceptions() {}

  static final class YetAnotherCheckedException extends Exception {}

  static final class SomeUncheckedException extends RuntimeException {}

  static final class SomeChainingException extends RuntimeException {
    public SomeChainingException(Throwable cause) {
      super(cause);
    }
  }

  private TestExceptions() {}

    SomeCheckedException cause = new SomeCheckedException();
    SomeChainingException exception = new SomeChainingException(cause);
    assertSame(cause, getRootCause(exception));
  }

  public void testGetRootCause_doubleWrapped() {
    SomeCheckedException cause = new SomeCheckedException();
    SomeChainingException exception = new SomeChainingException(new SomeChainingException(cause));
    assertSame(cause, getRootCause(exception));
  }