public void convertNullSDKToSDK()
 {
     sdkSenderImageSignature1 = null;
     converter = new SenderImageSignatureConverter(sdkSenderImageSignature1);
     Assert.IsNull(converter.ToSDKSenderImageSignature());
 }
 public void convertNullAPIToSDK()
 {
     apiSenderImageSignature1 = null;
     converter = new SenderImageSignatureConverter(apiSenderImageSignature1);
     Assert.IsNull(converter.ToSDKSenderImageSignature());
 }