code: def test_central_longitude(lon):
      mill = ccrs.Miller(central_longitude=lon)
      other_args = {"a=6378137.0", f"lon_0={lon}"}
      check_proj_params("mill", mill, other_args)
  
      assert_almost_equal(
          np.array(mill.x_limits), [-20037508.3427892, 20037508.3427892]
      )
      assert_almost_equal(
          np.array(mill.y_limits), [-14691480.7691731, 14691480.7691731]
      )
  
file_path: cartopy/lib/cartopy/tests/crs/test_miller.py
imports: import numpy
  from numpy.testing import assert_almost_equal
  import pytest
  import cartopy.crs
  from .helpers import check_proj_params
label_desc: Use image node_id 5 for calling a global function with example usage: test_central_longitude(lon) without return types