add test coverage for Option and Stream return types

tooling/metamodel-generator/src/test/java/org/hibernate/jpamodelgen/test/dao/Dao.java

@@ -12,6 +12,8 @@ import org.hibernate.query.SelectionQuery;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.util.List;
+import java.util.Optional;
+import java.util.stream.Stream;
 
 public interface Dao {
 
@@ -20,6 +22,9 @@ public interface Dao {
     @Find
     Book getBook(String isbn);
 
+    @Find
+    Optional<Book> getBookIfAny(String isbn);
+
     @Find(enabledFetchProfiles="Goodbye")
     Book getBookFetching(String isbn);
 
@@ -47,6 +52,9 @@ public interface Dao {
     @HQL("where title like ?1")
     List<Book> findBooksByTitle(String title);
 
+    @HQL("where title like ?1")
+    Stream<Book> streamBooksByTitle(String title);
+
     @HQL("from Book where title like ?1")
     TypedQuery<Book> findByTitle(String title);
 
@@ -89,6 +97,9 @@ public interface Dao {
     @HQL("from Book where isbn = :isbn")
     Book findByIsbn(String isbn);
 
+    @HQL("from Book where isbn = :isbn")
+    Optional<Book> findByIsbnIfExists(String isbn);
+
     @SQL("select * from Book where isbn = :isbn")
     Book findByIsbnNative(String isbn);