ml-agents/unity-environment/Assets/ML-Agents/Examples/Template/Scripts/TemplateDecision.cs

using System.Collections.Generic;
using UnityEngine;
using MLAgents;

public class TemplateDecision : MonoBehaviour, Decision
{

    public float[] Decide(
        List<float> vectorObs,
        List<Texture2D> visualObs,
        float reward,
        bool done,
        List<float> memory)
    {
        return new float[0];
    }

    public List<float> MakeMemory(
        List<float> vectorObs,
        List<Texture2D> visualObs,
        float reward,
        bool done,
        List<float> memory)
    {
        return new List<float>();
    }
}