Fix customer authz engine

Author: n1v0lg

plugins/examples/security-authorization-engine/src/main/java/org/elasticsearch/example/CustomAuthorizationEngine.java

@@ -13,6 +13,7 @@
 import org.elasticsearch.action.support.SubscribableListener;
 import org.elasticsearch.cluster.metadata.IndexAbstraction;
 import org.elasticsearch.cluster.metadata.ProjectMetadata;
+import org.elasticsearch.core.Nullable;
 import org.elasticsearch.xpack.core.security.action.user.GetUserPrivilegesResponse;
 import org.elasticsearch.xpack.core.security.action.user.GetUserPrivilegesResponse.Indices;
 import org.elasticsearch.xpack.core.security.authc.Authentication;
@@ -35,7 +36,6 @@
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
-import java.util.function.Supplier;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -119,19 +119,19 @@ public void loadAuthorizedIndices(
     ) {
         if (isSuperuser(requestInfo.getAuthentication().getEffectiveSubject().getUser())) {
             listener.onResponse(new AuthorizedIndices() {
-                public Supplier<Set<String>> all() {
+                public Set<String> all(@Nullable String selector) {
                     return () -> indicesLookup.keySet();
                 }
-                public boolean check(String name) {
+                public boolean check(String name, @Nullable String selector) {
                     return indicesLookup.containsKey(name);
                 }
             });
         } else {
             listener.onResponse(new AuthorizedIndices() {
-                public Supplier<Set<String>> all() {
+                public Set<String> all(@Nullable String selector) {
                     return () -> Set.of();
                 }
-                public boolean check(String name) {
+                public boolean check(String name, @Nullable String selector) {
                     return false;
                 }
             });