code: def get_geometry_from_name(self, name):
          
          for gg in self.cg_list:
              if gg.name == name or name in gg.alternative_names:
                  return gg
          raise LookupError(
              'No coordination geometry found with name "{name}"'.format(
                  name=name))
docs: Returns the coordination geometry of the given name.
          :param name: The name of the coordination geometry.