src/vs/workbench/services/themes/common/colorThemeData.ts/ColorThemeData/resolveTokenStyleValue
class ColorThemeData:	public resolveTokenStyleValue(tokenStyleValue: TokenStyleValue | undefined): TokenStyle | undefined {
		if (tokenStyleValue === undefined) {
			return undefined;
		} else if (typeof tokenStyleValue === 'string') {
			const { type, modifiers, language } = parseClassifierString(tokenStyleValue, '');
			return this.getTokenStyle(type, modifiers, language);
		} else if (typeof tokenStyleValue === 'object') {
			return tokenStyleValue;
		}
		return undefined;
	}