export class Container {
    static instance: Container;
    
    private instances: Map<string, object> = new Map();
    
    public set<T extends {constructor: {name: string}}>(instance: T, name: string|null = null): void
    {
        this.instances.set(name ?? instance.constructor.name, instance);
    }
    
    public get<T>(name: string): T
    {
        return <T>this.instances.get(name);
    }
    
    static getInstance(): Container {
        if (!Container.instance) {
            Container.instance = new Container();
        }
        
        return Container.instance;
    }
    public static get<T>(name: string): T {
        return Container.instance.get<T>(name);
    }
}