diff --git a/spring-core/src/main/java/org/springframework/util/function/SingletonSupplier.java b/spring-core/src/main/java/org/springframework/util/function/SingletonSupplier.java index f001c2b2581..a86d3b4f49b 100644 --- a/spring-core/src/main/java/org/springframework/util/function/SingletonSupplier.java +++ b/spring-core/src/main/java/org/springframework/util/function/SingletonSupplier.java @@ -20,6 +20,7 @@ import java.util.concurrent.locks.Lock; import java.util.concurrent.locks.ReentrantLock; import java.util.function.Supplier; +import org.jspecify.annotations.NonNull; import org.jspecify.annotations.Nullable; import org.springframework.lang.Contract; @@ -131,7 +132,7 @@ public class SingletonSupplier implements Supplier