@Nullable
  public static XmlToken getStartTagNameElement(@NotNull XmlTag tag) {
    final ASTNode node = tag.getNode();
    if (node == null) return null;

    ASTNode current = node.getFirstChildNode();
    IElementType elementType;
    while (current != null
           && (elementType = current.getElementType()) != XmlTokenType.XML_NAME
           && elementType != XmlTokenType.XML_TAG_NAME) {
      current = current.getTreeNext();
    }
    return current == null ? null : (XmlToken)current.getPsi();
  }
@Nullable
  public static XmlToken getStartTagNameElement(@NotNull XmlTag tag)