code: def has_value(self) -> bool:
      return self._value is not None
  
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 8 for calling the SparseStorage obj's underlying member method code with example usage: obj.has_value() and returns: unknown