code: def get_serializer(context):
      
      cluster_config = context.get_cluster_config()
      serializer_clsname = cluster_config.get(constants.TOPOLOGY_SERIALIZER_CLASSNAME, None)
      if serializer_clsname is None:
        return PythonSerializer()
      else:
        try:
          topo_pex_path = context.get_topology_pex_path()
          pex_loader.load_pex(topo_pex_path)
          serializer_cls = pex_loader.import_and_get_class(topo_pex_path, serializer_clsname)
          serializer = serializer_cls()
          return serializer
        except Exception as e:
          raise RuntimeError("Error with loading custom serializer class: %s, with error message: %s"
                             % (serializer_clsname, str(e)))
docs: Returns a serializer for a given context