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