net.peeweek.gameplay-ingredients/Runtime/Managers/Messager/Playables/SendMessage/SendMessageBehaviour.cs

using System;
using UnityEngine;
using UnityEngine.Playables;
using UnityEngine.Timeline;

namespace GameplayIngredients.Playables
{
    [Serializable]
    public class SendMessageBehaviour : PlayableBehaviour
    {
        public string StartMessage;

        public override void OnBehaviourPlay(Playable playable, FrameData info)
        {
            base.OnBehaviourPlay(playable, info);
            if(StartMessage != "" )
            {
                if (Application.isPlaying)
                    Messager.Send(StartMessage);
                else
                    Debug.Log("[SendMessageBehaviour] Would have sent broadcast message : '" + StartMessage + "'");
            }
        }

        public override void OnGraphStart (Playable playable)
        {

        }
    }
}