title: ITK python wrapper not working with other optimizers during registration (v4)
body: <p>Using the example given on the itk website, I am able to get the RegularStepGradientDescentOptimizerv4 to work with MeanSquaresImageToImageMetricv4 and ImageRegistrationMethodv4 in python. However, when I want to use QuasiNewtonOptimizerv4, I get the error <code>TypeError: in method 'itkImageRegistrationMethodv4REGv4F2F2_SetOptimizer', argument 2 of type 'itkObjectToObjectOptimizerBaseTemplateD *'</code>.</p>
  <p>My code for each is as follows.</p>
  <pre><code>    PixelType = itk.ctype('float')
      fixedImage = itk.GetImageFromArray(fixed_img.astype(np.float32))
      movingImage = itk.GetImageFromArray(moving_img.astype(np.float32))
      
      Dimension = fixedImage.GetImageDimension()
      FixedImageType = itk.Image[PixelType, Dimension]
      MovingImageType = itk.Image[PixelType, Dimension]
  
      TransformType = itk.TranslationTransform[itk.D, Dimension]
      initialTransform = TransformType.New()
  
      optimizer = itk.QuasiNewtonOptimizerv4Template.New()
  
      optimizer1 = itk.RegularStepGradientDescentOptimizerv4.New(
          LearningRate=1,
          MinimumStepLength=0.001,
          RelaxationFactor=0.05,
          NumberOfIterations=100,
      )
      
      
      metric = itk.MeanSquaresImageToImageMetricv4[FixedImageType, MovingImageType].New()
      
      #THIS WORKS
      registration = itk.ImageRegistrationMethodv4.New(
          FixedImage=fixedImage,
          MovingImage=movingImage,
          Metric=metric,
          Optimizer=optimizer1,
          InitialTransform=initialTransform,
      )
  
  
      #THIS DOESN'T WORK
      registration = itk.ImageRegistrationMethodv4.New(
          FixedImage=fixedImage,
          MovingImage=movingImage,
          Metric=metric,
          Optimizer=optimizer,
          InitialTransform=initialTransform,
      )
  </code></pre>
  <p>Is there a way to get registration with the QuasiNewtonOptimizerv4 to work in python? Please advise, thanks.</p>