def config_arg(arguments, key, default = nil)
      value = if arguments[key].present?
        arguments[key]
      else
        configuration[key]
      end

      value = value.to_s if value.kind_of? Symbol

      return value
    end
def config_arg(arguments, key, default = nil)
      value = if arguments[key].present?
        arguments[key]
      else
        configuration[key]
      end

      value = value.to_s if value.kind_of? Symbol

      return value
    end
get value of an arg that can be supplied in search args OR config,
 with search_args over-ridding config. Also normalizes value to_s
 (for symbols/strings).