geometry-tower-defense/Assets/GameMain/Scripts/Definition/Event/EventRequirement/EventRequirementBase.cs

namespace GeometryTD.Core
{
    public abstract class EventRequirementBase
    {
        public abstract EventRequirementType RequirementType { get; }
        public abstract EventRequirementParam Param { get; }
    }

    public class EventRequirementParam
    {
    }
}