code: def _parallelize_dask(fun, iter, meta, backend, backend_params):
      """Parallelize loop via dask."""
      from dask import compute, delayed
  
      lazy = [delayed(fun)(x, meta=meta) for x in iter]
      if backend == "dask":
          return compute(*lazy, **backend_params)
      else:
          return lazy
  
label_desc: Use image node_id 4 for calling a global function with example usage: _parallelize_dask(fun, iter, meta, backend, backend_params) and returns: compute, lazy