code: def _register_submodule(name=None):
      """
      If name is provided, this registers and attaches a new submodule to the current module.
      :param name: the name of the submodule or None if no submodule is used
      :return: the module name for the (newly) registered submodule
      """
      return register_submodule(module, name) if name else __name__
  
imports: import inspect
  from operator import attrgetter
  import sys
  from sklearn.base import ClassifierMixin, RegressorMixin
  from h2o.utils.mixin import register_submodule
  from ..None import automl
  from ..None import estimators
  from ..None import transforms
  from .wrapper import estimator, params_as_h2o_frames, transformer, H2OConnectionMonitorMixin, H2OEstimatorPredictProbabilitiesSupport, H2OEstimatorScoreSupport, H2OEstimatorTransformSupport
label_desc: Use image node_id 2 for calling a global function with example usage: _register_submodule(name) and returns: unknown