code: def test_central_longitude(lon):
      robin = ccrs.Robinson(central_longitude=lon)
      other_args = {"a=6378137.0", f"lon_0={lon}"}
      check_proj_params("robin", robin, other_args)
  
      assert_almost_equal(
          robin.x_limits,
          [-17005833.3305252, 17005833.3305252],
          decimal=5,
      )
      assert_almost_equal(
          robin.y_limits, [-8625154.6651000, 8625154.6651000]
      )
  
file_path: cartopy/lib/cartopy/tests/crs/test_robinson.py
imports: import numpy
  from numpy.testing import assert_almost_equal, assert_array_almost_equal
  import pytest
  import cartopy.crs
  from .helpers import check_proj_params
label_desc: Use image node_id 6 for calling a global function with example usage: test_central_longitude(lon) without return types