# File lib/pdf/reader/explore.rb, line 46
    def output_parent (obj)
      case obj
      when Hash
        obj.each do |k,v|
          print "#{k}"; output_child(v); print "\n"
          Explore::const_set(k, k) if !Explore.const_defined?(k)
        end
      when Array
        obj.each_with_index {|o, i| print "#{i}: "; output_child(o); print "\n"}
      else
        output_child(obj)
        print "\n"
      end
    end