code: def sparse_size(self, dim: int) -> int:
      return self._sparse_sizes[dim]
  
imports: import warnings
  from typing import List, Optional, Tuple
  import torch
  from torch_scatter import scatter_add, segment_csr
  from torch_sparse.utils import Final, index_sort
label_desc: Use image node_id 13 for calling the SparseStorage obj's underlying member method code with example usage: obj.sparse_size(dim) and returns: self