using System;

[Serializable]
public abstract class KeyCompare
{
    public abstract bool Match(object obj);
}

[Serializable]
public class DefaultKey : KeyCompare
{
    public override bool Match(object obj) => true;
}

[Serializable]
public class MatePropertyKey : KeyCompare
{
    public MateProperty target;
    public override bool Match(object obj) => obj is MateProperty mate && mate.id == target.id;
}