code: def project_shape(
          self, projection: Union[pyproj.Proj, crs.Projection, None] = None
      ) -> base.BaseGeometry:
          
  
          if self.shape is None:
              return None
  
          if isinstance(projection, crs.Projection):
              projection = pyproj.Proj(projection.proj4_init)
  
          if projection is None:
              bounds = self.bounds
              projection = pyproj.Proj(
                  proj="aea",  # equivalent projection
                  lat_1=bounds[1],
                  lat_2=bounds[3],
                  lat_0=(bounds[1] + bounds[3]) / 2,
                  lon_0=(bounds[0] + bounds[2]) / 2,
              )
          projected_shape = transform(
              partial(
                  pyproj.transform, pyproj.Proj(init="EPSG:4326"), projection
              ),
              self.shape,
          )
  
          if not projected_shape.is_valid:
              warnings.warn("The chosen projection is invalid for current shape")
          return projected_shape
docs: Projection for a decent representation of the structure.
  
          By default, an equivalent projection is applied. Equivalent projections
          locally respect areas, which is convenient for the area attribute.