code: def test_cartesian2dcs_to_cf():
      csm = Cartesian2DCS(axis=Cartesian2DCSAxis.EASTING_NORTHING_FT)
      csm.to_cf() == [
          {
              "axis": "Y",
              "long_name": "Northing",
              "standard_name": "projection_y_coordinate",
              "units": "metre",
          },
          {
              "axis": "X",
              "long_name": "Easting",
              "standard_name": "projection_x_coordinate",
              "units": "metre",
          },
      ]
  
file_path: pyproj/test/crs/test_crs_coordinate_system.py
imports: import pytest
  from pyproj.crs.coordinate_system import Cartesian2DCS, Ellipsoidal2DCS, Ellipsoidal3DCS, VerticalCS
  from pyproj.crs.enums import Cartesian2DCSAxis, Ellipsoidal2DCSAxis, Ellipsoidal3DCSAxis, VerticalCSAxis
label_desc: Use image node_id 8 for calling a global function with example usage: test_cartesian2dcs_to_cf() without return types