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