code: def load_model(self):
      if self.network:
          logger.info(
              "Attempting to reload model when model is loaded. Returning"
          )
          return
      with self.lock:
          logger.info("Loading Model")
          start = timer()
          logger.info(f"JAX Devices: {jax.device_count()}")
          logger.info(
              f"JAX Runtime Initialized in {timer(start):.06} secs"
          )
          mesh_shape = (
              jax.device_count() // self.params["cores_per_replica"],
              self.params["cores_per_replica"],
          )
          self.devices = np.array(jax.devices()).reshape(mesh_shape)
          self.total_batch = (
              self.params["per_replica_batch"]
              * jax.device_count()
              // self.params["cores_per_replica"]
              * 8
          )
          maps.thread_resources.env = maps.ResourceEnv(
              maps.Mesh(self.devices, ("dp", "mp"))
          )
          network = CausalTransformer(self.params)
          logger.info(f"Loading Checkpoint")
          network.state = read_ckpt(
              network.state, "/app/model/", self.devices.shape[1]
          )
          logger.info(
              f"GPTJ Network loaded in {timer(start):.06} secs. Total Batch Size: {self.total_batch}"
          )
          del network.state["opt_state"]
          network.state = network.move_xmap(
              network.state, np.zeros(self.params["cores_per_replica"])
          )
          self.network = network
  
imports: import os
  import time
  import jax
  import optax
  import threading
  import numpy
  import logging
  from queue import Queue, Empty
  from jax.experimental import maps
  from transformers import GPT2TokenizerFast
  from mesh_transformer.checkpoint import read_ckpt
  from mesh_transformer.sampling import nucleaus_sample
  from mesh_transformer.transformer_shard import CausalTransformer
label_desc: Use image node_id 2 for calling the GPTJ obj's underlying member method code with example usage: obj.load_model() without return types