+ * Returns a Paged List of Reference instances where the default field matches the String queryString (as interpreted by the Lucene QueryParser)
+ *
+ * @param clazz filter the results by class (or pass null to return all Reference instances)
+ * @param queryString
+ * @param pageSize The maximum number of references returned (can be null for all matching references)
+ * @param pageNumber The offset (in pageSize chunks) from the start of the result set (0 - based)
+ * @param orderHints
+ * Supports path like <code>orderHints.propertyNames</code> which
+ * include *-to-one properties like createdBy.username or
+ * authorTeam.persistentTitleCache
+ * @param propertyPaths properties to be initialized
+ * @return a Pager Reference instances
+ * @see <a href="http://lucene.apache.org/java/2_4_0/queryparsersyntax.html">Apache Lucene - Query Parser Syntax</a>