diff --git a/main/java/com/google/android/setupcompat/util/WizardManagerHelper.java b/main/java/com/google/android/setupcompat/util/WizardManagerHelper.java
index 90de25e..f28cd6d 100644
--- a/main/java/com/google/android/setupcompat/util/WizardManagerHelper.java
+++ b/main/java/com/google/android/setupcompat/util/WizardManagerHelper.java
@@ -186,7 +186,8 @@
   }
 
   /**
-   * Checks whether an intent is running in the portal setup wizard flow.
+   * Checks whether an intent is running in the portal setup wizard flow. This API is supported
+   * since S.
    *
    * @param originalIntent The original intent that was used to start the step, usually via {@link
    *     Activity#getIntent()}.
@@ -230,8 +231,11 @@
   }
 
   /**
-   * Returns true if the intent passed in indicates that it is running in any setup wizard flow,
-   * including initial setup and deferred setup etc.
+   * Since Q, returns true if the intent passed in indicates that it is running in setup wizard
+   * flows, including initial, predeferred, deferred. Since S, it also supports portal setup.
+   *
+   * <p>Pre-Q, it is running in three setup wizard flows, including initial, predeferred, deferred
+   * setup.
    *
    * @param originalIntent The original intent that was used to start the step, usually via {@link
    *     Activity#getIntent()}.