code: def test_multistage_forecast_template_constants():
      """Tests `muiltistage_forecast_template_constants`"""
      constants = MultistageForecastTemplateConstants()
  
      assert constants.SILVERKITE_TWO_STAGE == SILVERKITE_TWO_STAGE
      assert constants.MULTISTAGE_EMPTY == MULTISTAGE_EMPTY
      assert (
          constants.MultistageForecastModelTemplateEnum
          == MultistageForecastModelTemplateEnum
      )
      assert constants.SILVERKITE_WOW == SILVERKITE_WOW
  
file_path: greykite/greykite/tests/framework/templates/test_multistage_forecast_template_config.py
imports: from greykite.framework.templates.auto_arima_template import AutoArimaTemplate
  from greykite.framework.templates.autogen.forecast_config import ModelComponentsParam
  from greykite.framework.templates.multistage_forecast_template_config import MULTISTAGE_EMPTY
  from greykite.framework.templates.multistage_forecast_template_config import SILVERKITE_TWO_STAGE
  from greykite.framework.templates.multistage_forecast_template_config import SILVERKITE_WOW
  from greykite.framework.templates.multistage_forecast_template_config import MultistageForecastModelTemplateEnum
  from greykite.framework.templates.multistage_forecast_template_config import MultistageForecastTemplateConfig
  from greykite.framework.templates.multistage_forecast_template_config import MultistageForecastTemplateConstants
  from greykite.framework.templates.prophet_template import ProphetTemplate
  from greykite.framework.templates.silverkite_template import SilverkiteTemplate
  from greykite.framework.templates.simple_silverkite_template import SimpleSilverkiteTemplate
label_desc: Use image node_id 1 for calling a global function with example usage: test_multistage_forecast_template_constants() without return types