ScriptableRenderPipeline/MaterialGraphProject/Assets/GraphFramework/SerializableGraph/Editor/Drawing/DrawData/TitleBarButtonDrawData.cs

using UnityEngine;
namespace UnityEditor.Graphing.Drawing
{
    public delegate void OnTitleBarButtonClicked();

    public class TitleBarButtonDrawData : ScriptableObject
    {
        public delegate void ClickCallback();

        public string text;
        public ClickCallback onClick { get; set; }

        protected TitleBarButtonDrawData() { }
    }
}