docs: def get_seed(self):
          """
          Collects the required information to generate a data estructure 
          that can be used to recreate exactly the same geometry object
          via *\*\*kwargs*.
          
          :returns: Object's sufficient info to initialize it.
          :rtype: dict
          """
          return {'polygons': [poly.points for poly in self],
                  'holes': [hole.points for hole in self.holes]}