let instanceMap = new Map();
export const instance = <T>(_class: { new (): T }): T => {
    if (instanceMap.has(_class)) {
        return instanceMap.get(_class);
    } else {
        const newclass = new _class();
        instanceMap.set(_class, newclass);
        return newclass;
    }
};



export function clearInstance(instance: any){
    if (instanceMap.has(instance)) {
        instanceMap.delete(instance);
    } else {
        instanceMap = new Map();
    }
}