diff --git a/platform/core-api/src/com/intellij/lang/injection/InjectedLanguageManager.java b/platform/core-api/src/com/intellij/lang/injection/InjectedLanguageManager.java
index 31587ba56e87..aef1da98c38a 100644
--- a/platform/core-api/src/com/intellij/lang/injection/InjectedLanguageManager.java
+++ b/platform/core-api/src/com/intellij/lang/injection/InjectedLanguageManager.java
@@ -1,4 +1,4 @@
-// Copyright 2000-2021 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.
+// Copyright 2000-2021 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.lang.injection;
 
 import com.intellij.injected.editor.DocumentWindow;
@@ -34,6 +34,10 @@ public abstract class InjectedLanguageManager {
   @Nullable
   public abstract PsiLanguageInjectionHost getInjectionHost(@NotNull PsiElement injectedElement);
 
+  /**
+   * @return range in the top level file if {@code injectedContext} is inside injection
+   *         unchanged {@code injectedTextRange} otherwise
+   */
   @NotNull
   public abstract TextRange injectedToHost(@NotNull PsiElement injectedContext, @NotNull TextRange injectedTextRange);
   public abstract int injectedToHost(@NotNull PsiElement injectedContext, int injectedOffset);