code: def gen_class_A_B():
      class A:
          def f1(self):
              pass
  
          def f2(self):
              pass
  
          def delegated_f3(self):
              pass
  
          @delegate(delegated_f3)
          def f3(self):
              pass
  
      class B(A):
          def f1(self):
              pass
  
      return A, B
  
file_path: mlflow/tests/utils/test_gorilla.py
imports: import pytest
  from mlflow.utils import gorilla
label_desc: Use image node_id 2 for calling a global function with example usage: gen_class_A_B() and returns: A,  B