# File lib/clamp/subcommand/declaration.rb, line 63
      def default_subcommand(*args, &block)
        if args.empty?
          @default_subcommand
        else
          $stderr.puts "WARNING: Clamp default_subcommand syntax has changed; check the README."
          $stderr.puts "  (from #{caller.first})"
          self.default_subcommand = args.first
          subcommand(*args, &block)
        end
      end