three.js/examples/jsm/loaders/VTKLoader.d.ts

import {
  BufferGeometry,
  Loader,
  LoadingManager
} from '../../../src/Three';

export class VRMLLoader extends Loader {
  constructor(manager?: LoadingManager);

  load(url: string, onLoad: (geometry: BufferGeometry) => void, onProgress?: (event: ProgressEvent) => void, onError?: (event: ErrorEvent) => void): void;
  parse(data: ArrayBuffer | string, path: string): BufferGeometry;
}