Cloner.cs

using System;

namespace Unity.VisualScripting
{
    public abstract class Cloner<T> : ICloner
    {
        protected Cloner() { }

        public abstract bool Handles(Type type);

        void ICloner.BeforeClone(Type type, object original)
        {
            BeforeClone(type, (T)original);
        }

        public virtual void BeforeClone(Type type, T original) { }

        object ICloner.ConstructClone(Type type, object original)
        {
            return ConstructClone(type, (T)original);
        }

        public virtual T ConstructClone(Type type, T original)
        {
            return (T)Activator.CreateInstance(type, true);
        }

        void ICloner.FillClone(Type type, ref object clone, object original, CloningContext context)
        {
            var _instance = (T)clone;
            FillClone(type, ref _instance, (T)original, context);
            clone = _instance;
        }

        public virtual void FillClone(Type type, ref T clone, T original, CloningContext context) { }

        void ICloner.AfterClone(Type type, object clone)
        {
            AfterClone(type, (T)clone);
        }

        public virtual void AfterClone(Type type, T clone) { }
    }
}