From 837225c53d55700ff485367bb0fa71890f905e2e Mon Sep 17 00:00:00 2001
From: MediaPipe Team <mediapipe-team@google.com>
Date: Tue, 22 Nov 2022 17:30:23 -0800
Subject: [PATCH] Internal change

PiperOrigin-RevId: 490374976
---
 mediapipe/framework/validated_graph_config.cc | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/mediapipe/framework/validated_graph_config.cc b/mediapipe/framework/validated_graph_config.cc
index 16aad6e9b..01e3da83e 100644
--- a/mediapipe/framework/validated_graph_config.cc
+++ b/mediapipe/framework/validated_graph_config.cc
@@ -1048,6 +1048,14 @@ absl::Status ValidatedGraphConfig::ValidateRequiredSidePacketTypes(
   for (const auto& required_item : required_side_packets_) {
     auto iter = side_packet_types.find(required_item.first);
     if (iter == side_packet_types.end()) {
+      bool is_optional = true;
+      for (int index : required_item.second) {
+        is_optional &= input_side_packets_[index].packet_type->IsOptional();
+      }
+      if (is_optional) {
+        // Side packets that are optional and not provided are ignored.
+        continue;
+      }
       statuses.push_back(mediapipe::InvalidArgumentErrorBuilder(MEDIAPIPE_LOC)
                          << "Side packet \"" << required_item.first
                          << "\" is required but was not provided.");