code: def serialize_scipy_sparse_dok(x):
      coo_header, coo_frames = dask_serialize(x.tocoo())
  
      header = {"coo_header": coo_header}
      frames = coo_frames
  
      return header, frames
  
imports: from __future__ import annotations
  import scipy
  from distributed.protocol.serialize import dask_deserialize, dask_serialize, register_generic
label_desc: Use image node_id 1 for calling a global function with example usage: serialize_scipy_sparse_dok(x) and returns: header,  frames