XmlFile:test.xml
  PsiElement(XML_DOCUMENT)
    PsiElement(XML_PROLOG)
      <empty list>
    PsiErrorElement:Top level element is not completed
      XmlToken:XML_END_TAG_START('</')
      XmlToken:XML_NAME('foo')
      XmlToken:XML_TAG_END('>')
    XmlTag:
      PsiErrorElement:Valid XML document must have a root tag
        <empty list>