code: def _generate_data(self):
      self.batch_id += 1
      return SampleBatch(
          {
              SampleBatch.T: [0, 1],
              SampleBatch.ACTIONS: 2 * [np.random.choice([0, 1])],
              SampleBatch.REWARDS: 2 * [np.random.rand()],
              SampleBatch.OBS: 2 * [np.random.random((4,))],
              SampleBatch.NEXT_OBS: 2 * [np.random.random((4,))],
              SampleBatch.TERMINATEDS: 2 * [False, False],
              SampleBatch.TRUNCATEDS: 2 * [False, True],
              SampleBatch.SEQ_LENS: [2],
              SampleBatch.EPS_ID: 2 * [self.batch_id],
              SampleBatch.AGENT_INDEX: 2 * [self.batch_id],
              "batch_id": 2 * [self.batch_id],
          }
      )
  
file_path: ray/python/ray/rllib/utils/replay_buffers/tests/test_multi_agent_prioritized_replay_buffer.py
imports: import unittest
  import numpy
  from ray.rllib.policy.sample_batch import SampleBatch, MultiAgentBatch, DEFAULT_POLICY_ID, concat_samples
  from ray.rllib.utils.replay_buffers.multi_agent_prioritized_replay_buffer import MultiAgentPrioritizedReplayBuffer
  from ray.rllib.utils.test_utils import check
  from ray.rllib.utils.replay_buffers.replay_buffer import _ALL_POLICIES
label_desc: Use image node_id 1 for calling the TestMultiAgentPrioritizedReplayBuffer obj's underlying member method code with example usage: obj._generate_data() and returns: SampleBatch