@Override
  public boolean isAttached() {
    return resolvedFileObject.isAttached();
  }
@Test
  public void testDelegatesIsAttached() {
    when( resolvedFileObject.isAttached() ).thenReturn( true );

    assertTrue( fileObject.isAttached() );

    when( resolvedFileObject.isAttached() ).thenReturn( false );

    assertFalse( fileObject.isAttached() );

    verify( resolvedFileObject, times( 2 ) ).isAttached();
  }