mechanize：Mechanize::Form#textarea_field?

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="text" name="text1" />
  <input type="hidden" name="hidden1" />
  <textarea name="textarea1" rows="4" cols="40">foo</textarea>
</form>

</body>
</html>
>> require 'mechanize'
=> true
>> agent = Mechanize.new
=> #<Mechanize:0xb74d6540 ...
>> page = agent.get('http://127.0.0.1:8080/test10_form.html')
=> #<Mechanize::Page
  ...
>> f = page.form('form1')
=> #<Mechanize::Form
  ...
>> f.textarea_field?("text1")
=> false
>> f.textarea_field?("textarea1")
=> false
>> f.texts
=> [#<Mechanize::Form::Text:0xb74ca204 @name="text1", @value="", @node=#<Nokogiri::XML::Element:0x..fdba651d4 name="input" attributes=[#<Nokogiri::XML::Attr:0x..fdba637da name="type" value="text">, #<Nokogiri::XML::Attr:0x..fdba637d0 name="name" value="text1">]>>]
>> f.textareas
=> []
>> f.fields
=> [#<Mechanize::Form::Text:0xb74ca204 @name="text1", @value="", @node=#<Nokogiri::XML::Element:0x..fdba651d4 name="input" attributes=[#<Nokogiri::XML::Attr:0x..fdba637da name="type" value="text">, #<Nokogiri::XML::Attr:0x..fdba637d0 name="name" value="text1">]>>, #<Mechanize::Form::Hidden:0xb74ca038 @name="hidden1", @value="", @node=#<Nokogiri::XML::Element:0x..fdba65184 name="input" attributes=[#<Nokogiri::XML::Attr:0x..fdba622f4 name="type" value="hidden">, #<Nokogiri::XML::Attr:0x..fdba622ea name="name" value="hidden1">]>>, #<Mechanize::Form::Field:0xb74c98cc @name="textarea1", @value="foo", @node=#<Nokogiri::XML::Element:0x..fdba64ca2 name="textarea" attributes=[#<Nokogiri::XML::Attr:0x..fdba60e40 name="name" value="textarea1">, #<Nokogiri::XML::Attr:0x..fdba60e36 name="rows" value="4">, #<Nokogiri::XML::Attr:0x..fdba60e2c name="cols" value="40">] children=[#<Nokogiri::XML::Text:0x..fdba5fc8e "foo">]>>]

？

form.rb が以下のようになっているから、しょうがない気も

class Mechanize
  ...
  class Form
    ...
    def parse
      ...
      # Find all textarea tags
      form_node.search('textarea').each do |node|
        next if node['name'].nil?
        @fields << Field.new(node, node.inner_text)
      end


↓は何の意味があるのだ？？？

class Mechanize
  ...
  class Form
    ...
    def parse
      ...
      form_node.search('input').each do |node|
      ...
        when 'textarea'
          @fields << Textarea.new(node, node['value'] || '')