@Override
  public XPathExpression @NotNull [] getArgumentList() {
    final ASTNode[] nodes = getNode().getChildren(XPath2ElementTypes.EXPRESSIONS);
    final XPathExpression[] expressions = new XPathExpression[nodes.length];
    for (int i = 0; i < expressions.length; i++) {
      expressions[i] = (XPathExpression)nodes[i].getPsi();
    }
    return expressions;
  }
@Override
  public XPathExpression @NotNull [] getArgumentList()