Unity events in inspector example

using System;
using System.Reflection;
using UnityEngine;
using System.Collections;
using UnityEngine.EventSystems;
using UnityEngine.Events;

public class MyEventObject : MonoBehaviour, IEventSystemHandler
{
    [RenamedSerializedData("onPress")]
    [SerializeField]
    private ButtonClickedEvent m_OnClick = new ButtonClickedEvent();

    public void Start()
    {
    ButtonPressed();
    }

    private void ButtonPressed()
    {
        m_OnClick.Invoke();
    }

    [Serializable]
    public class ButtonClickedEvent : UnityEvent
    {}
}