Change grid getPredicate() method to force a pre-process

Author: gustavnavar

gridcore/src/main/java/me/agno/gridcore/Grid.java

@@ -52,10 +52,14 @@ public class Grid<T> implements IGrid<T> {
     @Getter
     private Class<T> targetType;
 
-    @Getter
     @Setter
     private Predicate predicate;
 
+    public Predicate getPredicate() {
+        preProcess();
+        return predicate;
+    }
+
     @Getter
     @Setter
     private List<Order> orderList;