public void convertNullAPIToAPI()
 {
     apiSenderImageSignature1 = null;
     converter = new SenderImageSignatureConverter(apiSenderImageSignature1);
     Assert.IsNull(converter.ToAPISenderImageSignature());
 }
 public void convertNullSDKToAPI()
 {
     sdkSenderImageSignature1 = null;
     converter = new SenderImageSignatureConverter(sdkSenderImageSignature1);
     Assert.IsNull(converter.ToAPISenderImageSignature());
 }