extensions/typescript-language-features/src/utils/typingsStatus.ts/TypingsStatus/constructor
class TypingsStatus:	constructor(client: ITypeScriptServiceClient) {
		super();
		this._client = client;

		this._register(
			this._client.onDidBeginInstallTypings(event => this.onBeginInstallTypings(event.eventId)));

		this._register(
			this._client.onDidEndInstallTypings(event => this.onEndInstallTypings(event.eventId)));
	}