export function getWords(): Array<string>
export function getNums(): Array<number>
export function sumNums(nums: Array<number>): number
export function readFileAsync(path: string): Promise<Buffer>
export function asyncMultiTwo(arg: number): Promise<number>
export function getCwd(callback: (arg0: string) => void): void
export function readFile(
  callback: (arg0: Error | undefined, arg1: string | null) => void,
): void
export function eitherStringOrNumber(input: string | number): number
export function returnEither(input: number): string | number
export function either3(input: string | number | boolean): number
interface Obj {
  v: string | number
}
export function either4(input: string | number | boolean | Obj): number
export enum Kind {
  Dog = 0,
  Cat = 1,
  Duck = 2,
}
export enum CustomNumEnum {
  One = 1,
  Two = 2,
  Three = 3,
  Four = 4,
  Six = 6,
  Eight = 8,
  Nine = 9,
  Ten = 10,
}
export function enumToI32(e: CustomNumEnum): number
export function throwError(): void
export function mapOption(val: number | null): number | null
export function add(a: number, b: number): number
export function fibonacci(n: number): number
export function listObjKeys(obj: object): Array<string>
export function createObj(): object
interface PackageJson {
  name: string
  version: string
  dependencies: Record<string, any> | null
  devDependencies: Record<string, any> | null
}
export function readPackageJson(): PackageJson
export function getPackageJsonName(packageJson: PackageJson): string
export function contains(source: string, target: string): boolean
export function concatStr(mutS: string): string
export function concatUtf16(s: string): string
export function concatLatin1(s: string): string
export function withoutAbortController(a: number, b: number): Promise<number>
export function withAbortController(
  a: number,
  b: number,
  signal: AbortSignal,
): Promise<number>
export function getBuffer(): Buffer
export class Animal {
  readonly kind: Kind
  constructor(kind: Kind, name: string)
  static withKind(kind: Kind): Animal
  get name(): string
  set name(name: string)
  whoami(): string
  static getDogKind(): Kind
}
export class Blake2BHasher {
  static withKey(key: Blake2bKey): Blake2BHasher
}
export class Blake2BKey {}
export class Context {
  constructor()
  static withData(data: string): Context
  method(): string
}
export class ClassWithFactory {
  name: string
  static withName(name: string): ClassWithFactory
}