#566 - Refactor internals - SpiExpression, add prepareExpression() to merge queryAutoTuneHash() and queryPlanHash() - tidy up createQueryRequest

src/main/java/com/avaje/ebeaninternal/api/SpiQuery.java

@@ -294,6 +294,11 @@ public interface SpiQuery<T> extends Query<T> {
    */
   boolean initManyWhereJoins();
 
+  /**
+   * Return true if one Many fetch join is allowed.
+   */
+  boolean isAllowOneManyFetch();
+
   /**
    * Return the joins required to support predicates on the many properties.
    */