code: def test_coordinate_system_from_json():
      # separate test from other properties due to
      # https://github.com/OSGeo/PROJ/issues/1818
      aeqd_cs = CRS(
          proj="aeqd", lon_0=-80, lat_0=40.5
      ).coordinate_system
      assert CoordinateSystem.from_json(aeqd_cs.to_json()) == aeqd_cs
  
file_path: pyproj/test/crs/test_crs_json.py
imports: import pytest
  from pyproj.crs import CRS, CoordinateOperation, CoordinateSystem, Datum, Ellipsoid, PrimeMeridian
label_desc: Use image node_id 13 for calling a global function with example usage: test_coordinate_system_from_json() without return types