add helpId getter and setter to Tool Window content

platform/platform-api/src/com/intellij/ui/content/Content.java

@@ -1,17 +1,5 @@
 /*
- * Copyright 2000-2015 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
  */
 package com.intellij.ui.content;
 
@@ -132,4 +120,11 @@ public interface Content extends UserDataHolder, ComponentContainer {
    */
   void setExecutionId(long executionId);
   long getExecutionId();
+
+  default void setHelpId(@NonNls String helpId) {}
+
+  @Nullable
+  default String getHelpId() {
+    return null;
+  }
 }

platform/platform-impl/src/com/intellij/ui/content/impl/ContentImpl.java

@@ -1,17 +1,5 @@
 /*
- * Copyright 2000-2014 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
  */
 package com.intellij.ui.content.impl;
 
@@ -66,6 +54,7 @@ public class ContentImpl extends UserDataHolderBase implements Content {
   private String mySeparator;
   private Icon myPopupIcon;
   private long myExecutionId;
+  private String myHelpId;
 
   public ContentImpl(JComponent component, String displayName, boolean isPinnable) {
     myComponent = component;
@@ -381,4 +370,15 @@ public class ContentImpl extends UserDataHolderBase implements Content {
   public long getExecutionId() {
     return myExecutionId;
   }
+
+  @Override
+  public void setHelpId(String helpId) {
+    myHelpId = helpId;
+  }
+
+  @Nullable
+  @Override
+  public String getHelpId() {
+    return myHelpId;
+  }
 }