code: def get_brain_class():
      """Return the proper Brain class based on the current 3d backend.
  
      Returns
      -------
      brain : object
          The Brain class corresponding to the current 3d backend.
      """
      from ...viz._brain import Brain
  
      return Brain
  
imports: import importlib
  import time
  from contextlib import contextmanager
  from functools import partial
  import numpy
  from ...utils import _auto_weakref, _check_option, _validate_type, fill_doc, get_config, logger, verbose
  from .._3d import _get_3d_option
  from ..utils import safe_event
  from ._utils import VALID_3D_BACKENDS
label_desc: Use image node_id 16 for calling a global function with example usage: get_brain_class() and returns: Brain