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import { InjectionToken } from "./index.ts";import { Registration } from "./dependency-container.ts";
export default class Registry {  protected _registryMap = new Map<InjectionToken<any>, Registration[]>();
  public entries(): IterableIterator<[InjectionToken<any>, Registration[]]> {    return this._registryMap.entries();  }
  public getAll(key: InjectionToken<any>): Registration[] {    this.ensure(key);    return this._registryMap.get(key)!;  }
  public get(key: InjectionToken<any>): Registration | null {    this.ensure(key);    const value = this._registryMap.get(key)!;    return value[value.length - 1] || null;  }
  public set(key: InjectionToken<any>, value: Registration): void {    this.ensure(key);    this._registryMap.get(key)!.push(value);  }
  public setAll(key: InjectionToken<any>, value: Registration[]): void {    this._registryMap.set(key, value);  }
  public has(key: InjectionToken<any>): boolean {    this.ensure(key);    return this._registryMap.get(key)!.length > 0;  }
  public clear(): void {    this._registryMap.clear();  }
  private ensure(key: InjectionToken<any>): void {    if (!this._registryMap.has(key)) {      this._registryMap.set(key, []);    }  }}