src/vs/workbench/browser/parts/titlebar/windowTitle.ts/WindowTitle/getTitleDecorations
class WindowTitle:	getTitleDecorations() {
		let prefix: string | undefined;
		let suffix: string | undefined;

		if (this.properties.prefix) {
			prefix = this.properties.prefix;
		}
		if (this.environmentService.isExtensionDevelopment) {
			prefix = !prefix
				? WindowTitle.NLS_EXTENSION_HOST
				: `${WindowTitle.NLS_EXTENSION_HOST} - ${prefix}`;
		}

		if (this.properties.isAdmin) {
			suffix = WindowTitle.NLS_USER_IS_ADMIN;
		}
		if (!this.properties.isPure) {
			suffix = !suffix
				? WindowTitle.NLS_UNSUPPORTED
				: `${suffix} ${WindowTitle.NLS_UNSUPPORTED}`;
		}
		return { prefix, suffix };
	}