net.peeweek.gameplay-ingredients/Runtime/Ingredients/Messager/Playables/SendMessage/SendMessageMixerBehaviour.cs

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

namespace GameplayIngredients.Playables
{
    public class SendMessageMixerBehaviour : PlayableBehaviour
    {
        // NOTE: This function is called at runtime and edit time.  Keep that in mind when setting the values of properties.
        public override void ProcessFrame(Playable playable, FrameData info, object playerData)
        {
            int inputCount = playable.GetInputCount ();

            for (int i = 0; i < inputCount; i++)
            {
                float inputWeight = playable.GetInputWeight(i);
                ScriptPlayable<SendMessageBehaviour> inputPlayable = (ScriptPlayable<SendMessageBehaviour>)playable.GetInput(i);
                SendMessageBehaviour input = inputPlayable.GetBehaviour ();
            
                // Use the above variables to process each frame of this playable.
            
            }
        }
    }
}