code: def test_towgs84_transformation__defaults():
      transformation = ToWGS84Transformation(GeographicCRS())
      assert transformation.towgs84 == [
          0.0,
          0.0,
          0.0,
          0.0,
          0.0,
          0.0,
          0.0,
      ]
      assert _to_dict(transformation) == {
          "Scale difference": 0.0,
          "X-axis rotation": 0.0,
          "X-axis translation": 0.0,
          "Y-axis rotation": 0.0,
          "Y-axis translation": 0.0,
          "Z-axis rotation": 0.0,
          "Z-axis translation": 0.0,
      }
  
imports: import pytest
  from numpy.testing import assert_almost_equal
  from pyproj.crs import GeographicCRS
  from pyproj.crs.coordinate_operation import AlbersEqualAreaConversion, AzimuthalEquidistantConversion, EquidistantCylindricalConversion, GeostationarySatelliteConversion, HotineObliqueMercatorBConversion, LambertAzimuthalEqualAreaConversion, LambertConformalConic1SPConversion, LambertConformalConic2SPConversion, LambertCylindricalEqualAreaConversion, LambertCylindricalEqualAreaScaleConversion, MercatorAConversion, MercatorBConversion, OrthographicConversion, PlateCarreeConversion, PolarStereographicAConversion, PolarStereographicBConversion, PoleRotationNetCDFCFConversion, RotatedLatitudeLongitudeConversion, SinusoidalConversion, StereographicConversion, ToWGS84Transformation, TransverseMercatorConversion, UTMConversion, VerticalPerspectiveConversion
  from pyproj.exceptions import CRSError
label_desc: Use image node_id 49 for calling a global function with example usage: test_towgs84_transformation__defaults() without return types