code: def test_process_crs_pyproj_proj():
      pyproj = pytest.importorskip("pyproj")
      ccrs = pytest.importorskip("cartopy.crs")
      crs = process_crs(pyproj.Proj(init="epsg:4326"))
      assert isinstance(crs, ccrs.PlateCarree)
  
imports: import numpy
  import pandas
  import pytest
  from unittest import TestCase, SkipTest
  from hvplot.util import check_crs, is_list_like, process_crs, process_xarray, _convert_col_names_to_str, instantiate_crs_str
label_desc: Use image node_id 4 for calling a global function with example usage: test_process_crs_pyproj_proj() without return types