Fix NullAway findings

Signed-off-by: Stefano Cordio <[email protected]>

Author: scordio

pom.xml

@@ -191,6 +191,7 @@
 							<!-- Check JSpecify annotations -->
 							-Xep:NullAway:ERROR
 							-XepOpt:NullAway:OnlyNullMarked
+							-XepOpt:NullAway:CustomContractAnnotations=org.springframework.lang.Contract
 						</compilerArg>
 					</compilerArgs>
 					<annotationProcessorPaths>

spring-batch-core/src/main/java/org/springframework/batch/core/configuration/support/DefaultJobLoader.java

@@ -222,7 +222,7 @@ private Collection<Job> doLoad(ApplicationContextFactory factory, boolean unregi
 	 * @return all the {@link Step} defined by the given step locator and context
 	 * @see StepLocator
 	 */
-	private Collection<Step> getSteps(final StepLocator stepLocator, final ApplicationContext jobApplicationContext) {
+	private Collection<Step> getSteps(StepLocator stepLocator, final ApplicationContext jobApplicationContext) {
 		final Collection<String> stepNames = stepLocator.getStepNames();
 		final Collection<Step> result = new ArrayList<>();
 		for (String stepName : stepNames) {