code: def test_is_exist(self, setup):
      assert LOCAL_KG.is_exist([f"{URL}#Alice", "foo"]) is False
      assert (
          LOCAL_KG.is_exist(
              [
                  f"{URL}#Alice",
                  f"{URL}#Bob",
                  f"{URL}#Casper",
                  f"{URL}#Dean",
              ]
          )
          is True
      )
  
imports: import numpy
  import pytest
  from pyrdf2vec.graphs import KG, Vertex
label_desc: Use image node_id 11 for calling the TestKG obj's underlying member method code with example usage: obj.test_is_exist(setup) without return types