code: def reset(self):
      self.cur_step = 0
      self._update_possible_actions_mask()
      return self._get_state()
  
file_path: ReAgent/reagent/gym/envs/functionality/possible_actions_mask_tester.py
imports: import gym
  import numpy
  from gym.spaces import Box, Discrete
label_desc: Use image node_id 4 for calling the PossibleActionsMaskTester obj's underlying member method code with example usage: obj.reset() and returns: self