core/src/main/java/org/sakaiproject/nakamura/api/lite/StorageClientUtils.java
public static String arrayUnEscape(String string) {
        string = string.replaceAll("%2", ",");
        string = string.replaceAll("%1", "%");
        return string;
    }
public static String arrayUnEscape(String string) {
        string = string.replaceAll("%2", ",");
        string = string.replaceAll("%1", "%");
        return string;
    }
TODO: Unit test