code: def get_gpu_mem():
      return torch.cuda.memory_allocated() / 1024**2
  
imports: import argparse
  import os
  from contextlib import nullcontext
  from functools import partial
  from time import time
  import psutil
  import torch
  import torch.nn
  from commons.model_zoo import model_builder
  from commons.utils import get_data, get_profile_context, get_tflops, get_time_stamp
  from packaging import version
  import colossalai
  from colossalai.booster import Booster
  from colossalai.booster.plugin import GeminiPlugin, LowLevelZeroPlugin, TorchDDPPlugin
  from colossalai.lazy import LazyInitContext
  from colossalai.logging import disable_existing_loggers, get_dist_logger
  from colossalai.nn.optimizer import HybridAdam
  from colossalai.utils import get_current_device
label_desc: Use image node_id 3 for calling a global function with example usage: get_gpu_mem() and returns: unknown