extensions/typescript-language-features/src/languageFeatures/diagnostics.ts/DiagnosticSettings/setEnableSuggestions
class DiagnosticSettings:	public setEnableSuggestions(language: DiagnosticLanguage, value: boolean): boolean {
		return this.update(language, settings => ({
			validate: settings.validate,
			enableSuggestions: value
		}));
	}