code: def call(self, input, passed):
      x = input
      for layer in self.layer_list:
          x = layer(x)
  
      x = self.channel_sum(x)
      fwd = self.add([x, passed])
      x = fwd
  
      for layer in self.layer_list2:
          x = layer(x)
  
      return fwd, x
  
imports: import logging
  import numpy
  from dipy.data import get_fnames
  from dipy.testing.decorators import doctest_skip_parser
  from dipy.utils.optpkg import optional_package
  from dipy.align.reslice import reslice
  from dipy.nn.utils import normalize, set_logger_level, transform_img
  from dipy.nn.utils import recover_img, correct_minor_errors
label_desc: Use image node_id 2 for calling the Block obj's underlying member method code with example usage: obj.call(input, passed) and returns: fwd,  x