code: def setup_class(self):
      self.point_a = (-3.474083, 50.727301)
      self.point_b = (0.5, 50.5)
      self.src_crs = ccrs.PlateCarree()
      self.nan = float("nan")
  
file_path: cartopy/lib/cartopy/tests/crs/test_transverse_mercator.py
imports: import numpy
  import pytest
  import cartopy.crs
label_desc: Use image node_id 1 for calling the TestOSGB obj's underlying member method code with example usage: obj.setup_class() without return types