From 553603f97b001d97ea0abdbab2288581c7b76de9 Mon Sep 17 00:00:00 2001
From: Error Prone Team <java-team-github-bot@google.com>
Date: Wed, 24 Mar 2021 14:18:00 -0700
Subject: [PATCH] Add a missing `@Nullable` annotation.

PiperOrigin-RevId: 364889141
---
 .../src/main/java/com/google/errorprone/util/ASTHelpers.java     | 1 +
 1 file changed, 1 insertion(+)

diff --git a/check_api/src/main/java/com/google/errorprone/util/ASTHelpers.java b/check_api/src/main/java/com/google/errorprone/util/ASTHelpers.java
index 90bb7fd49a2..3690c75c120 100644
--- a/check_api/src/main/java/com/google/errorprone/util/ASTHelpers.java
+++ b/check_api/src/main/java/com/google/errorprone/util/ASTHelpers.java
@@ -1024,6 +1024,7 @@ public Tree visitParameterizedType(ParameterizedTypeTree tree, Void unused) {
   }
 
   /** Return the enclosing {@code ClassSymbol} of the given symbol, or {@code null}. */
+  @Nullable
   public static ClassSymbol enclosingClass(Symbol sym) {
     // sym.owner is null in the case of module symbols.
     return sym.owner == null ? null : sym.owner.enclClass();