Note some nonnull parameters

core/src/main/java/hudson/model/Items.java

@@ -46,6 +46,8 @@ import java.util.List;
 import java.util.Stack;
 import java.util.StringTokenizer;
 import javax.annotation.CheckForNull;
+import javax.annotation.Nonnull;
+
 import jenkins.model.DirectlyModifiableTopLevelItemGroup;
 import org.apache.commons.io.FileUtils;
 
@@ -138,7 +140,7 @@ public class Items {
     /**
      * Does the opposite of {@link #toNameList(Collection)}.
      */
-    public static <T extends Item> List<T> fromNameList(ItemGroup context, String list, Class<T> type) {
+    public static <T extends Item> List<T> fromNameList(ItemGroup context, @Nonnull String list, @Nonnull Class<T> type) {
         Jenkins hudson = Jenkins.getInstance();
 
         List<T> r = new ArrayList<T>();

core/src/main/java/jenkins/model/Jenkins.java

@@ -2389,7 +2389,7 @@ public class Jenkins extends AbstractCIBase implements DirectlyModifiableTopLeve
         return getItem(pathName,context!=null?context.getParent():null);
     }
 
-    public final <T extends Item> T getItem(String pathName, ItemGroup context, Class<T> type) {
+    public final <T extends Item> T getItem(String pathName, ItemGroup context, @Nonnull Class<T> type) {
         Item r = getItem(pathName, context);
         if (type.isInstance(r))
             return type.cast(r);