@Override
  public XPathAxisSpecifier getAxisSpecifier() {
    final ASTNode node = getNode().findChildByType(XPathElementTypes.AXIS_SPECIFIER);
    if (node != null) {
      return (XPathAxisSpecifier)node.getPsi();
    } else {
      return findFromXPath2FilterExpr(XPathElementTypes.AXIS_SPECIFIER, XPathAxisSpecifier.class);
    }
  }
@Override
  public XPathAxisSpecifier getAxisSpecifier()