code: def bfs(G, start):
      return cugraph.dask.bfs(
          G, start=start, return_distances=True, check_start=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 3 for calling a global function with example usage: bfs(G, start) and returns: cugraph