code: def _extend(
      self,
      trajectory,
      action=0,
      dist_inputs=0,
      reward=0,
      done=False,
      new_observation=0,
  ):
      trajectory.extend(
          action=action,
          dist_inputs=dist_inputs,
          reward=reward,
          done=done,
          new_observation=new_observation,
      )
  
imports: import os
  from absl.testing import absltest
  import gym
  import numpy
  from trax import test_utils
  from trax.rl import task
label_desc: Use image node_id 2 for calling the TaskTest obj's underlying member method code with example usage: obj._extend(trajectory, action, dist_inputs, reward, done, new_observation) without return types