def redis_key_normalize *metrics
      @redis_key_normalize_conf ||= []
      metrics.each do |metric|
        raise ArgumentError, "Please provide valid normalization: #{VALID_NORMALIZATIONS.join(", ")}" unless VALID_NORMALIZATIONS.include?(metric)
        @redis_key_normalize_conf << metric
      end
    end
def redis_key_normalize *metrics
      @redis_key_normalize_conf ||= []
      metrics.each do |metric|
        raise ArgumentError, "Please provide valid normalization: #{VALID_NORMALIZATIONS.join(", ")}" unless VALID_NORMALIZATIONS.include?(metric)
        @redis_key_normalize_conf << metric
      end
    end
set redis model to normalize redis keys