Storybook Builder Api Interface

export interface Builder<Config, BuilderStats extends Stats = Stats> {
  getConfig: (options: Options) => Promise<Config>;
  start: (args: {
    options: Options;
    startTime: ReturnType<typeof process.hrtime>;
    router: ServerApp;
    server: HttpServer;
    channel: ServerChannel;
  }) => Promise<void | {
    stats?: BuilderStats;
    totalTime: ReturnType<typeof process.hrtime>;
    bail: (e?: Error) => Promise<void>;
  }>;
  build: (arg: {
    options: Options;
    startTime: ReturnType<typeof process.hrtime>;
  }) => Promise<void | BuilderStats>;
  bail: (e?: Error) => Promise<void>;
  corePresets?: string[];
  overridePresets?: string[];
}