def variation_name=(variation_name)

      if !variation_name.nil? && variation_name.to_s.length > 255
        fail ArgumentError, "invalid value for 'variation_name', the character length must be smaller than or equal to 255."
      end

      @variation_name = variation_name
    end
def variation_name=(variation_name)

      if !variation_name.nil? && variation_name.to_s.length > 255
        fail ArgumentError, "invalid value for 'variation_name', the character length must be smaller than or equal to 255."
      end

      @variation_name = variation_name
    end
Custom attribute writer method with validation
 @param [Object] variation_name Value to be assigned