class_docstr: The method base class for graph generation. To write a new graph generation method, create a new class
  inheriting from this class and implement the functions.
docstr: Running graph generation for random generation task.
docstr_tok: ["Running","graph","generation","for","random","generation","task","."]
code: def run_rand_gen(self, *args, **kwargs):
      r"""
      Running graph generation for random generation task.
      """
  
      raise NotImplementedError(
          "The function run_rand_gen is not implemented!"
      )
  
label_desc: Use image node_id 2 for calling the Generator obj's underlying member method code with example usage: obj.run_rand_gen() without return types