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export function notImplemented(msg?: string): never {  const message = msg ? `Not implemented: ${msg}` : "Not implemented";  throw new Error(message);}
// API helpers
export type MaybeNull<T> = T | null;export type MaybeDefined<T> = T | undefined;export type MaybeEmpty<T> = T | null | undefined;
export function intoCallbackAPI<T>(  /* eslint-disable-next-line @typescript-eslint/no-explicit-any */  func: (...args: any[]) => Promise<T>,  cb: MaybeEmpty<(err: MaybeNull<Error>, value: MaybeEmpty<T>) => void>,  /* eslint-disable-next-line @typescript-eslint/no-explicit-any */  ...args: any[]): void {  func(...args)    .then((value) => cb && cb(null, value))    .catch((err) => cb && cb(err, null));}
export function intoCallbackAPIWithIntercept<T1, T2>(  /* eslint-disable-next-line @typescript-eslint/no-explicit-any */  func: (...args: any[]) => Promise<T1>,  interceptor: (v: T1) => T2,  cb: MaybeEmpty<(err: MaybeNull<Error>, value: MaybeEmpty<T2>) => void>,  /* eslint-disable-next-line @typescript-eslint/no-explicit-any */  ...args: any[]): void {  func(...args)    .then((value) => cb && cb(null, interceptor(value)))    .catch((err) => cb && cb(err, null));}