code: def _list_outputs(self):
      outputs = self.output_spec().get()
      outputs["camino"] = os.path.abspath(self._gen_outfilename())
      return outputs
  
imports: import os
  from ...utils.filemanip import split_filename
  from ..base import CommandLineInputSpec, CommandLine, traits, TraitedSpec, File
label_desc: Use image node_id 1 for calling the Trackvis2Camino obj's underlying member method code with example usage: obj._list_outputs() and returns: outputs