mechanize：Mechanize::Form#reset_button?

everyday Ruby

以下のような HTML で

<html>
<head>
<title>form test</title>
</head>
<body>

<form method="get" action="cgi/foo00.cgi" name="form1">
  <input type="submit" value="Send" />　
  <input type="reset"  value="Cancel" />
</form>

</body>
</html>
>> require 'mechanize'
=> true
>> agent = Mechanize.new
=> #<Mechanize:0xb74e4604 ...
>> page = agent.get('http://127.0.0.1:8080/test11_button.html')
=> #<Mechanize::Page
  ...
>> f = page.form('form1')
=> #<Mechanize::Form
  ...
>> f.reset_button?("")
=> false
>> f.reset_button?("hoge")
=> false
>> f.reset_button?("Send")
=> false
>> f.resets
=> []
>> f.submits
=> [#<Mechanize::Form::Submit:0xb74d82a0 @name=nil, @value="Send", @node=#<Nokogiri::XML::Element:0x..fdba6c1dc name="input" attributes=[#<Nokogiri::XML::Attr:0x..fdba6a6f2 name="type" value="submit">, #<Nokogiri::XML::Attr:0x..fdba6a6e8 name="value" value="Send">]>>]

parse 内の処理のせいで使えないようになっているという理解で良い？？？