jodd-core/src/main/java/jodd/util/PropertiesUtil.java
public static String resolveProperty(final Map map, final String key) {
		String value = getProperty(map, key);
		if (value == null) {
			return null;
		}
		value = stp.parse(value, macroName -> getProperty(map, macroName));

		return value;
	}
public static String resolveProperty(final Map map, final String key) {
		String value = getProperty(map, key);
		if (value == null) {
			return null;
		}
		value = stp.parse(value, macroName -> getProperty(map, macroName));

		return value;
	}
Returns property with resolved variables.