code: def _get_all_plots_estimator():
      exp = TSForecastingExperiment()
      data = get_data("airline")
      exp.setup(data=data)
      all_plots = exp._available_plots_estimator_keys
      all_plots = [None] + all_plots
      return all_plots
  
imports: import random
  import numpy
  import pandas
  from pandas.testing import assert_frame_equal
  from sktime.forecasting.base import ForecastingHorizon
  from pycaret.containers.models.time_series import get_all_model_containers
  from pycaret.datasets import get_data
  from pycaret.time_series import TSForecastingExperiment
  from pycaret.utils.time_series import SeasonalPeriod
label_desc: Use image node_id 3 for calling a global function with example usage: _get_all_plots_estimator() and returns: all_plots