public static PsiElement[] getXmlNamesFromSingleTagFile(XmlFile xmlFile) {
    XmlTag tag = xmlFile.getDocument().getRootTag();
    assert tag != null;
    PsiElement[] answer = new PsiElement[2];
    int cnt = 0;
    for (PsiElement child : tag.getChildren()) {
      if (child instanceof XmlToken) {
        IElementType type = ((XmlToken)child).getTokenType();
        if (type == XmlTokenType.XML_NAME) {
          answer[cnt++] = child;
        }
      }
    }
    return answer;
  }
public static PsiElement[] getXmlNamesFromSingleTagFile(XmlFile xmlFile)