class_docstr: Creates a Connectome File Format (CFF) file from input networks, surfaces, volumes, tracts, etcetera....
  
  Example
  -------
  
  >>> import nipype.interfaces.cmtk as cmtk
  >>> cvt = cmtk.CFFConverter()
  >>> cvt.inputs.title = 'subject 1'
  >>> cvt.inputs.gifti_surfaces = ['lh.pial_converted.gii', 'rh.pial_converted.gii']
  >>> cvt.inputs.tract_files = ['streamlines.trk']
  >>> cvt.inputs.gpickled_networks = ['network0.gpickle']
  >>> cvt.run()                 # doctest: +SKIP
code: def _list_outputs(self):
      outputs = self._outputs().get()
      _, name, ext = split_filename(self.inputs.out_file)
      if not ext == ".cff":
          ext = ".cff"
      outputs["connectome_file"] = op.abspath(name + ext)
      return outputs
  
imports: import os
  import os.path
  import datetime
  import string
  import networkx
  from ...utils.filemanip import split_filename
  from ..base import BaseInterfaceInputSpec, traits, File, TraitedSpec, InputMultiPath, isdefined
  from .base import CFFBaseInterface, have_cfflib
label_desc: Use image node_id 2 for calling the CFFConverter obj's underlying member method code with example usage: obj._list_outputs() and returns: outputs