code: def store_transition(self, frame, action, reward, done, extra_info=None):
          
          self.deque.store_transition(frame, action, reward, done, extra_info=extra_info)
  
          # We add element with max priority to all the trees
          for segment_tree in self.segment_trees:
              segment_tree.append(segment_tree.max)
docs: Store given transition in the backend