code: def get_browser_backend():
      """Return the 2D backend currently used.
  
      Returns
      -------
      backend_used : str | None
          The 2D browser backend currently in use. If no backend is found,
          returns ``None``.
      """
      try:
          backend_name = _init_browser_backend()
      except RuntimeError as exc:
          backend_name = None
          logger.info(str(exc))
      return backend_name
  
imports: import importlib
  from abc import ABC, abstractmethod
  from collections import OrderedDict
  from contextlib import contextmanager
  from copy import deepcopy
  from itertools import cycle
  import numpy
  from .._fiff.pick import _DATA_CH_TYPES_SPLIT
  from ..defaults import _handle_default
  from ..filter import _iir_filter, _overlap_add_filter
  from ..fixes import _compare_version
  from ..utils import _check_option, _get_stim_channel, _validate_type, get_config, logger, set_config, verbose
  from .backends._utils import VALID_BROWSE_BACKENDS
  from .utils import _get_color_list, _setup_plot_projector, _show_browser
label_desc: Use image node_id 6 for calling a global function with example usage: get_browser_backend() and returns: backend_name