public void convertNullSDKToSDK()
 {
     sdkVisibility1 = null;
     converter      = new DocumentVisibilityConverter(sdkVisibility1);
     Assert.IsNull(converter.ToSDKDocumentVisibility());
 }
 public void convertNullAPIToSDK()
 {
     apiVisibility1 = null;
     converter      = new DocumentVisibilityConverter(apiVisibility1);
     Assert.IsNull(converter.ToSDKDocumentVisibility());
 }