diff --git a/core/src/main/java/hudson/model/Job.java b/core/src/main/java/hudson/model/Job.java
index 8c4e3183100a9..430a734eb1839 100644
--- a/core/src/main/java/hudson/model/Job.java
+++ b/core/src/main/java/hudson/model/Job.java
@@ -53,19 +53,7 @@
 import hudson.search.SearchItems;
 import hudson.security.ACL;
 import hudson.tasks.LogRotator;
-import hudson.util.AlternativeUiTextProvider;
-import hudson.util.ChartUtil;
-import hudson.util.ColorPalette;
-import hudson.util.CopyOnWriteList;
-import hudson.util.DataSetBuilder;
-import hudson.util.DescribableList;
-import hudson.util.FormApply;
-import hudson.util.Graph;
-import hudson.util.ProcessTree;
-import hudson.util.RunList;
-import hudson.util.ShiftedCategoryAxis;
-import hudson.util.StackedAreaRenderer2;
-import hudson.util.TextFile;
+import hudson.util.*;
 import hudson.widgets.HistoryWidget;
 import hudson.widgets.HistoryWidget.Adapter;
 import hudson.widgets.Widget;
@@ -120,15 +108,13 @@
 import org.kohsuke.accmod.restrictions.NoExternalUse;
 import org.kohsuke.args4j.Argument;
 import org.kohsuke.args4j.CmdLineException;
-import org.kohsuke.stapler.StaplerOverridable;
-import org.kohsuke.stapler.StaplerRequest;
-import org.kohsuke.stapler.StaplerResponse;
+import org.kohsuke.stapler.*;
 import org.kohsuke.stapler.export.Exported;
 import org.kohsuke.stapler.interceptor.RequirePOST;
 import org.kohsuke.stapler.verb.POST;
 
 /**
- * A job is an runnable entity under the monitoring of Hudson.
+ * A job is a runnable entity under the monitoring of Hudson.
  *
  * <p>
  * Every time it "runs", it will be recorded as a {@link Run} object.
@@ -1618,4 +1604,9 @@ public BuildTimelineWidget getTimeline() {
     }
 
     private static final HexStringConfidentialKey SERVER_COOKIE = new HexStringConfidentialKey(Job.class, "serverCookie", 16);
+
+    @Restricted(NoExternalUse.class)
+    public static FormValidation doCheckDisplayNameOrNull(@AncestorInPath AbstractProject<?, ?> project, @QueryParameter String value) {
+        return Jenkins.get().doCheckDisplayName(value, project.getName());
+    }
 }
diff --git a/core/src/main/java/jenkins/plugins/DetachedPluginsUtil.java b/core/src/main/java/jenkins/plugins/DetachedPluginsUtil.java
index 4001c8fffe69f..68ee4480a611d 100644
--- a/core/src/main/java/jenkins/plugins/DetachedPluginsUtil.java
+++ b/core/src/main/java/jenkins/plugins/DetachedPluginsUtil.java
@@ -4,8 +4,6 @@
 import edu.umd.cs.findbugs.annotations.NonNull;
 import hudson.ClassicPluginStrategy;
 import hudson.PluginWrapper;
-import hudson.model.AbstractProject;
-import hudson.util.FormValidation;
 import hudson.util.VersionNumber;
 import java.io.IOException;
 import java.io.InputStream;
@@ -21,8 +19,6 @@
 import org.apache.commons.io.IOUtils;
 import org.kohsuke.accmod.Restricted;
 import org.kohsuke.accmod.restrictions.NoExternalUse;
-import org.kohsuke.stapler.AncestorInPath;
-import org.kohsuke.stapler.QueryParameter;
 
 /**
  * Dedicated class to handle the logic related to so-called <em>detached plugins</em>.
@@ -211,9 +207,4 @@ public String toString() {
             return shortName + " " + splitWhen.toString().replace(".*", "") + " " + requiredVersion;
         }
     }
-
-    @Restricted(NoExternalUse.class)
-    public static FormValidation doCheckDisplayNameOrNull(@AncestorInPath AbstractProject<?, ?> project, @QueryParameter String value) {
-        return Jenkins.get().doCheckDisplayName(value, project.getName());
-    }
 }