human
Solve the following python programming problem given the following code:
def plan_agenda(self, scene_state, timestep) : 
    def evaluator(state, ts) : 
        try : 
            score = (np.dot (self.features.features (state, timestep = ts), self.features.weights) + self.features.w0) 
except : 
            return ((- np.inf) * np.r_ [np.ones (len (self.features.weights))]) 
return score 
def simulate_transfer(state, action, next_state_id) : 
        aug_traj = self.transferer.transfer (self.demos [action], state, plotting = False) 
        self.lfd_env.execute_augmented_trajectory (aug_traj, step_viewer = 0) 
        result_state = self.lfd_env.observe_scene () 
        for sim_obj in self.lfd_env.sim.sim_objs : 
            if isinstance (sim_obj, simulation_object.RopeSimulationObject) : 
                rope_sim_obj = sim_obj 
                break 
rope_knot = is_knot (rope_sim_obj.rope.GetControlPoints ()) 
        return (result_state, next_state_id, rope_knot) 
return beam_search (scene_state, timestep, self.features.src_ctx.seg_names, <MASK>, evaluator, self.lfd_env.sim, width = self.width, depth = self.depth) 
    
    Given the code above, what is a proper replacement for <MASK>?
assistant
#Here is a proper replacement for <MASK>.
def simulate_transfer(