HtmlFile:test.html
  PsiElement(HTML_DOCUMENT)
    PsiElement(XML_PROLOG)
      <empty list>
    HtmlTag:a
      XmlToken:XML_START_TAG_START('<')
      XmlToken:XML_NAME('a')
      XmlToken:XML_TAG_END('>')
      XmlText
        PsiWhiteSpace(' ')
      HtmlTag:b
        XmlToken:XML_START_TAG_START('<')
        XmlToken:XML_NAME('b')
        XmlToken:XML_TAG_END('>')
        XmlText
          PsiWhiteSpace(' ')
        HtmlTag:c
          XmlToken:XML_START_TAG_START('<')
          XmlToken:XML_NAME('c')
          XmlToken:XML_TAG_END('>')
          XmlText
            PsiWhiteSpace(' ')
          HtmlTag:d
            XmlToken:XML_START_TAG_START('<')
            XmlToken:XML_NAME('d')
            XmlToken:XML_TAG_END('>')
            XmlText
              PsiWhiteSpace(' ')
            PsiErrorElement:Element d is not closed
              <empty list>
      XmlToken:XML_END_TAG_START('</')
      XmlToken:XML_NAME('a')
      XmlToken:XML_TAG_END('>')