src/vs/workbench/api/common/extHostProfileContentHandler.ts/ExtHostProfileContentHandlers/$readProfile
class ExtHostProfileContentHandlers:	async $readProfile(id: string, uri: UriComponents, token: CancellationToken): Promise<string | null> {
		const handler = this.handlers.get(id);
		if (!handler) {
			throw new Error(`Unknown handler with id: ${id}`);
		}

		return handler.readProfile(URI.revive(uri), token);
	}