extensions/typescript-language-features/src/languageFeatures/fileConfigurationManager.ts/FileConfigurationManager/setGlobalConfigurationFromDocument
class FileConfigurationManager:	public async setGlobalConfigurationFromDocument(
		document: vscode.TextDocument,
		token: vscode.CancellationToken,
	): Promise<void> {
		const formattingOptions = this.getFormattingOptions(document);
		if (!formattingOptions) {
			return;
		}

		const args: Proto.ConfigureRequestArguments = {
			file: undefined /*global*/,
			...this.getFileOptions(document, formattingOptions),
		};
		await this.client.execute('configure', args, token);
	}