code: def fps(src, batch, ratio, random_start, batch_size, ptr):  # noqa
      # type: (Tensor, Optional[Tensor], Optional[Tensor], bool, Optional[int], Optional[Tensor]) -> Tensor  # noqa
      pass
  
file_path: pytorch_cluster/torch_cluster/fps.py
imports: from typing import List, Optional, Union
  import torch
  from torch import Tensor
  import torch_cluster.typing
label_desc: Use image node_id 2 for calling a global function with example usage: fps(src, batch, ratio, random_start, batch_size, ptr) without return types