code: def test_drop(self):
      tg = TG(gremlin_client=fake_client({DROP_QUERY: 1}))
      assert tg.drop_graph() is tg
  
imports: from typing import Iterable
  import os, numpy, pandas, pyarrow, pytest, queue
  from common import NoAuthTestCase
  from concurrent.futures import Future
  from mock import patch
  from gremlin_python.driver.resultset import ResultSet
  from gremlin_python.structure.graph import Vertex, Edge, Path
  from graphistry.gremlin import CosmosMixin, GremlinMixin, DROP_QUERY, nodes_to_queries, edges_to_queries
  from graphistry.plotter import PlotterBase
label_desc: Use image node_id 2 for calling the TestGremlinMixin obj's underlying member method code with example usage: obj.test_drop() without return types