code: def setUp(self):
      self.G1 = NaiveBayes(
          feature_vars=["b", "c", "d", "e"], dependent_var="a"
      )
      self.G2 = NaiveBayes(
          feature_vars=["g", "l", "s"], dependent_var="d"
      )
  
imports: import unittest
  import networkx
  import pandas
  import numpy
  from pgmpy.models import NaiveBayes
  from pgmpy.independencies import Independencies
label_desc: Use image node_id 1 for calling the TestNaiveBayesMethods obj's underlying member method code with example usage: obj.setUp() without return types