def create_group_dampening(dampening)
      ret = http_post "triggers/groups/#{dampening.trigger_id}/dampenings", dampening.to_h
      Trigger::Dampening.new(ret)
    end
def create_group_dampening(dampening)
      ret = http_post "triggers/groups/#{dampening.trigger_id}/dampenings", dampening.to_h
      Trigger::Dampening.new(ret)
    end
Creates a dampening for a group trigger
 @param [Dampening] dampening the dampening to create
 @return [Dampening] the newly created dampening