code: def matmul(src, other, reduce):  # noqa: F811
      # type: (SparseTensor, torch.Tensor, str) -> torch.Tensor
      pass
  
file_path: pytorch_sparse/torch_sparse/matmul.py
imports: from typing import Optional, Tuple
  import torch
  from torch import Tensor
  from torch_sparse.tensor import SparseTensor
label_desc: Use image node_id 10 for calling a global function with example usage: matmul(src, other, reduce) without return types