code: def boundary(self):
      # XXX Should this be a LinearRing?
      w, h = self._half_width, self._half_height
      return sgeom.LineString(
          [
              (-w + self.left_offset, -h),
              (-w + self.left_offset, h),
              (w - self.right_offset, h),
              (w - self.right_offset, -h),
              (-w + self.left_offset, -h),
          ]
      )
  
imports: import itertools
  import time
  import numpy
  import pytest
  import shapely.geometry
  import cartopy.crs
label_desc: Use image node_id 2 for calling the FakeProjection obj's underlying member method code with example usage: obj.boundary() and returns: sgeom