# File lib/nanoc3/base/dependency_tracker.rb, line 250
    def print_graph
      @items.each do |item|
        puts "#{item.inspect} depends on:"

        predecessors = direct_predecessors_of(item)
        predecessors.each do |pred|
          puts "    #{pred.inspect}"
        end
        puts "    (nothing!)" if predecessors.empty?
        puts
      end
    end