code: def _request_post(self, url):
      return argparse.Namespace(ok=True)
  
file_path: MONAILabel/tests/unit/datastore/test_xnat.py
imports: import argparse
  import os
  import unittest
  from monailabel.datastore.xnat import XNATDatastore
label_desc: Use image node_id 2 for calling the XNATDatastorMocked obj's underlying member method code with example usage: obj._request_post(url) and returns: argparse