class_docstr: Helper utility used to load holoviews extensions. These can be
  plotting extensions, element extensions or anything else that can be
  registered to work with HoloViews.
code: def _ignore_bokeh_warnings(self):
      import warnings
  
      from bokeh.util.warnings import BokehUserWarning
  
      warnings.filterwarnings(
          "ignore",
          category=BokehUserWarning,
          message="reference already known",
      )
  
imports: import inspect
  import os
  import shutil
  import sys
  from collections import defaultdict
  from inspect import Parameter, Signature
  from pathlib import Path
  from types import FunctionType
  import param
  from pyviz_comms import extension
  from ..core import Dataset, Dimensioned, DynamicMap, HoloMap, Store, StoreOptions, ViewableElement, util
  from ..core.operation import Operation, OperationCallable
  from ..core.options import Keywords, Options, options_policy
  from ..core.overlay import Overlay
  from ..core.util import merge_options_to_dict
  from ..operation.element import function
  from ..streams import Params, Stream, streams_list_from_dict
  from .settings import OutputSettings, list_backends, list_formats
label_desc: Use image node_id 3 for calling the extension obj's underlying member method code with example usage: obj._ignore_bokeh_warnings() without return types