code: def test_proj_params(self):
      check_proj_params(
          "omerc", self.oblique_mercator, self.proj_params
      )
  
file_path: cartopy/lib/cartopy/tests/crs/test_oblique_mercator.py
imports: from copy import deepcopy
  from typing import Dict, List, NamedTuple, Tuple
  import numpy
  import pytest
  import cartopy.crs
  from .helpers import check_proj_params
label_desc: Use image node_id 2 for calling the TestCrsArgs obj's underlying member method code with example usage: obj.test_proj_params() without return types