From c56bddd7074d3c62c94ca494e2e9983dbc98da6d Mon Sep 17 00:00:00 2001
From: Mark Hansen <markhansen@google.com>
Date: Mon, 6 May 2024 17:35:05 -0700
Subject: [PATCH] Add UnknownFieldSet.isEmpty

Allows callers to check if field set is empty without cloning the map

PiperOrigin-RevId: 631237925
---
 .../src/main/java/com/google/protobuf/UnknownFieldSet.java   | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/java/core/src/main/java/com/google/protobuf/UnknownFieldSet.java b/java/core/src/main/java/com/google/protobuf/UnknownFieldSet.java
index b93e220333238..aa71004da75f1 100644
--- a/java/core/src/main/java/com/google/protobuf/UnknownFieldSet.java
+++ b/java/core/src/main/java/com/google/protobuf/UnknownFieldSet.java
@@ -83,6 +83,11 @@ public int hashCode() {
     return fields.hashCode();
   }
 
+  /** Whether the field set has no fields. */
+  public boolean isEmpty() {
+    return fields.isEmpty();
+  }
+
   /** Get a map of fields in the set by number. */
   public Map<Integer, Field> asMap() {
     // Avoid an allocation for the common case of an empty map.