code: def _run_interface(self, runtime):
      runtime.returncode = 0
      return runtime
  
file_path: nipype/nipype/pipeline/plugins/tests/test_somaflow.py
imports: import os
  from time import sleep
  import nipype.interfaces.base
  import pytest
  import nipype.pipeline.engine
  from nipype.pipeline.plugins.somaflow import soma_not_loaded
label_desc: Use image node_id 1 for calling the SomaTestInterface obj's underlying member method code with example usage: obj._run_interface(runtime) and returns: runtime