code: def sdd_lut(layout, block, device):
      lut = layout.nonzero(as_tuple=False).to(device).int()
      lut = lut.contiguous()
      return lut, None
  
file_path: triton/python/triton/ops/blocksparse/matmul.py
imports: import torch
  from ...None import cdiv, heuristics, jit
  from ...None import language
label_desc: Use image node_id 3 for calling a global function with example usage: sdd_lut(layout, block, device) and returns: lut,  None