# File lib/dnsruby/resource/APL.rb, line 56
        def create(arg)
          case arg
          when Prefixes
            return arg
          when String
            prefixes = arg.split(/\s/).map { |prefix| Prefix.create(prefix) }
          when Array
            prefixes = arg.map { |prefix| Prefix.create(prefix) }
          else
            raise ArgumentError.new("APL format erro #{arg}")
          end
          Prefixes.new(prefixes)
        end