ml-agents/Project/Assets/ML-Agents/Examples/Template/Scripts/TemplateAgent.cs

using UnityEngine;
using Unity.MLAgents;
using Unity.MLAgents.Actuators;
using Unity.MLAgents.Sensors;

public class TemplateAgent : Agent
{
    public override void CollectObservations(VectorSensor sensor)
    {
    }

    public override void OnActionReceived(ActionBuffers actionBuffers)

    {
    }

    public override void OnEpisodeBegin()
    {
    }
}