Interface EngineFunction

packages/engines/src/utils/getEngines.ts:7–13

export type RenderCallback = (err: Error | null, str?: string | any) => any;
export interface EngineFunction {
  (path: string, options: any, cb: RenderCallback): void;
  (path: string, options: any): Promise<string>;

  render(template: string, options: any, cb: RenderCallback): void;
  render(template: string, options: any): Promise<string>;
}

const callbackify = async (fn: any, cb?: RenderCallback) => {
  try {