class_docstr: Compressed Sparse Tensor 
class_docstr_tok: ["Compressed","Sparse","Tensor"]
code: def to_dense(self):
      it = self.indices.unsqueeze(1)
      full_indices = torch.cat(
          [it for _ in range(self.dense_size[1])], dim=1
      )
      return self.values.new_zeros(self.dense_size).scatter_add_(
          0, full_indices, self.values
      )
  
file_path: deepspeed/deepspeed/runtime/sparse_tensor.py
imports: import torch
label_desc: Use image node_id 4 for calling the SparseTensor obj's underlying member method code with example usage: obj.to_dense() and returns: self