code: def get_global_memory_buffer():
      """Return the global GlobalMemoryBuffer object"""
      assert (
          _GLOBAL_MEMORY_BUFFER is not None
      ), "global memory buffer is not initialized"
      return _GLOBAL_MEMORY_BUFFER
  
imports: import os
  from typing import Optional
  import torch
  from .utils import GlobalMemoryBuffer
label_desc: Use image node_id 54 for calling a global function with example usage: get_global_memory_buffer() and returns: _GLOBAL_MEMORY_BUFFER