Function registerSingleton

packages/agent-core/src/di/extensions.ts:56–74

(
  id: ServiceIdentifier<T>,
  ctorOrDescriptor:
    | SyncDescriptor<any>
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    | (new (...services: Services) => T),
  instantiationType?: boolean | InstantiationType,
)

  descriptor: SyncDescriptor<any>,
): void;
export function registerSingleton<T, Services extends BrandedService[]>(
  id: ServiceIdentifier<T>,
  ctorOrDescriptor:
    | SyncDescriptor<any>
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    | (new (...services: Services) => T),
  instantiationType?: boolean | InstantiationType,
): void {
  const descriptor =
    ctorOrDescriptor instanceof SyncDescriptor
      ? ctorOrDescriptor
      : new SyncDescriptor<T>(
          ctorOrDescriptor as new (...args: unknown[]) => T,
          [],
          Boolean(instantiationType),
        );

  _registry.push([id, descriptor]);
}

/**
 * Return the registry as a list suitable for `ServiceCollection`