code: def test_valid_freq():
      assert set(VALID_FREQ) == {"HOURLY", "DAILY", "WEEKLY"}
  
imports: from greykite.framework.templates.simple_silverkite_template_config import COMMON_MODELCOMPONENTPARAM_PARAMETERS
  from greykite.framework.templates.simple_silverkite_template_config import MULTI_TEMPLATES
  from greykite.framework.templates.simple_silverkite_template_config import SILVERKITE
  from greykite.framework.templates.simple_silverkite_template_config import SILVERKITE_ALGO
  from greykite.framework.templates.simple_silverkite_template_config import SILVERKITE_AR
  from greykite.framework.templates.simple_silverkite_template_config import SILVERKITE_CP
  from greykite.framework.templates.simple_silverkite_template_config import SILVERKITE_DAILY_1_CONFIG_1
  from greykite.framework.templates.simple_silverkite_template_config import SILVERKITE_DAILY_1_CONFIG_2
  from greykite.framework.templates.simple_silverkite_template_config import SILVERKITE_DAILY_1_CONFIG_3
  from greykite.framework.templates.simple_silverkite_template_config import SILVERKITE_DSI
  from greykite.framework.templates.simple_silverkite_template_config import SILVERKITE_EMPTY
  from greykite.framework.templates.simple_silverkite_template_config import SILVERKITE_FEASET
  from greykite.framework.templates.simple_silverkite_template_config import SILVERKITE_FREQ
  from greykite.framework.templates.simple_silverkite_template_config import SILVERKITE_GR
  from greykite.framework.templates.simple_silverkite_template_config import SILVERKITE_HOL
  from greykite.framework.templates.simple_silverkite_template_config import SILVERKITE_MONTHLY
  from greykite.framework.templates.simple_silverkite_template_config import SILVERKITE_SEAS
  from greykite.framework.templates.simple_silverkite_template_config import SILVERKITE_WSI
  from greykite.framework.templates.simple_silverkite_template_config import VALID_FREQ
  from greykite.framework.templates.simple_silverkite_template_config import SimpleSilverkiteTemplateConstants
  from greykite.framework.templates.simple_silverkite_template_config import SimpleSilverkiteTemplateOptions
label_desc: Use image node_id 2 for calling a global function with example usage: test_valid_freq() without return types