protected Object getContent(String localKey) {
        Object value = super.getContent(localKey);
        if (value != null) return value;
        return backingProfile.getContent(localKey);
    }
Returns a value from the content of this: The value in this, or the value from the backing if not set in this
container-search/src/main/java/com/yahoo/search/query/profile/BackedOverridableQueryProfile.java