# File lib/uttk/logger.rb, line 30
      def initialize ( backend_path, path )
        @backend_path = backend_path
        @path = path
      end

# File lib/uttk/logger.rb, line 34
      def to_s
        path, bpath = @path.to_s, @backend_path.to_s
        path += ' vs ' + bpath if path != bpath
        "The path notification flow contains two leaves at the same path (#{path})"
      end