new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  # emacs: -*- mode: python; py-indent-offset: 4; indent-tabs-mode: nil -*-
  # vi: set ft=python sts=4 ts=4 sw=4 et:
  from nipype.interfaces.base import (
      traits, isdefined, TraitedSpec, BaseInterfaceInputSpec,
      File, Directory, InputMultiPath, OutputMultiPath, Str,
      SimpleInterface
  )
  
  class DerivativesDataSinkInputSpec(BaseInterfaceInputSpec):
      pass
  
  class DerivativesDataSinkOutputSpec(TraitedSpec):
      pass
  
  class DerivativesDataSink(SimpleInterface):
      input_spec = DerivativesDataSinkInputSpec
      output_spec = DerivativesDataSinkOutputSpec
  
      def _run_interface(self, runtime):
  
          return runtime
  
subject: add bids interfaces