private TreeNode CreateUserDefinedFunctionNode(UserDefinedFunction userDefinedFunction)
{
TreeNode node = CreateTreeNode(userDefinedFunction.Name, "function", procedureContextMenu);
node.Nodes.Add(String.Empty);
TreeNodeController controller = new TreeNodeController();
controller.Populate += delegate { AddParameters(node, userDefinedFunction); };
controller.Refresh += delegate { userDefinedFunction.RefreshParameters(); };
controller.Tag = userDefinedFunction;
node.Tag = controller;
return(node);
}