code: def sssp(G, start):
      return cugraph.dask.sssp(G, source=start, check_source=False)
  
imports: import numpy
  import dask_cudf
  from dask.distributed import Client
  from dask_cuda import LocalCUDACluster
  from cugraph.structure.symmetrize import symmetrize_ddf
  from cugraph.dask.common.mg_utils import get_visible_devices
  from dask_cuda.initialize import initialize
  import cudf
  import cugraph
  from cugraph.dask.comms import comms
  import tempfile
  from cugraph.testing.mg_utils import generate_edgelist
label_desc: Use image node_id 4 for calling a global function with example usage: sssp(G, start) and returns: cugraph