code: def test_invalid_has_node():
      df = cudf.DataFrame([[1, 2]], columns=["src", "dst"])
      G = cugraph.Graph()
      G.from_cudf_edgelist(df, source="src", destination="dst")
      assert not G.has_node(-1)
      assert not G.has_node(0)
      assert not G.has_node(G.number_of_nodes() + 1)
  
imports: import gc
  import time
  import pytest
  import pandas
  import scipy
  import networkx
  import cupy
  import cudf
  import cugraph
  from cugraph.testing import utils
  from cudf.testing import assert_series_equal
  from cudf.testing.testing import assert_frame_equal
  import dask_cudf
  import cugraph.dask
  from dask.distributed import Client
  from dask_cuda import LocalCUDACluster
  from pylibcugraph import ResourceHandle
  from pylibcugraph import bfs
  from cugraph.dask.traversal.bfs import convert_to_cudf
  from cugraph.dask.common.mg_utils import is_single_gpu
label_desc: Use image node_id 23 for calling a global function with example usage: test_invalid_has_node() without return types