code: def setUp(self):
      super(GraphVisualizationTestCase, self).setUp()
      MockedDigraph.events = self.events = []
  
file_path: neupy/tests/layers/graph/test_visualizations.py
imports: import mock
  import tempfile
  import graphviz
  from neupy import layers
  from base import BaseTestCase
label_desc: Use image node_id 1 for calling the GraphVisualizationTestCase obj's underlying member method code with example usage: obj.setUp() without return types