function deferred() {
	/** @type {(value: T) => void} */
	var resolve;

	/** @type {(reason: any) => void} */
	var reject;

	/** @type {Promise<T>} */
	var promise = new Promise((res, rej) => {
		resolve = res;
		reject = rej;
	});

	// @ts-expect-error
	return { promise, resolve, reject };
}
TODO replace with Promise.withResolvers once supported widely enough
@template T