src/vs/workbench/services/themes/common/themeConfiguration.ts/ThemeConfiguration/setProductIconTheme
class ThemeConfiguration:	public async setProductIconTheme(theme: IWorkbenchProductIconTheme, settingsTarget: ThemeSettingTarget): Promise<IWorkbenchProductIconTheme> {
		await this.writeConfiguration(ThemeSettings.PRODUCT_ICON_THEME, theme.settingsId, settingsTarget);
		return theme;
	}