def symbolize_attributes!
      @attributes = {}.tap do |result|
        @attributes.each do |key, value|
          result[normalized_key key] = normalized_value value
        end
      end
    end
def symbolize_attributes!
      @attributes = {}.tap do |result|
        @attributes.each do |key, value|
          result[normalized_key key] = normalized_value value
        end
      end
    end
Makes the keys on @attributes be normalized symbols