def dump(obj, label = "", indent=0)
  if obj.class.respond_to? :keys
    obj.class.keys.each do |key|
      dump(obj.send(key), key, indent+1)
    end
  elsif obj.respond_to? :each
    obj.each do |o|
      # This would work, except the stack level goes too deep :-(
      #dump(o, " - ", indent+1)
    end
  else
    print "  " * indent, label, ": "
    puts obj.inspect
  end
end