From 8a003adfbdcc0b2110ae107ce20384599b61cf2a Mon Sep 17 00:00:00 2001
From: Sam Levenick <slevenick@google.com>
Date: Wed, 4 May 2022 15:21:31 -0700
Subject: [PATCH 1/2] Add no empty object AIP

---
 aip/cloud/24001.md | 66 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 aip/cloud/24001.md

diff --git a/aip/cloud/24001.md b/aip/cloud/24001.md
new file mode 100644
index 0000000000..43b33169c5
--- /dev/null
+++ b/aip/cloud/24001.md
@@ -0,0 +1,66 @@
+---
+id: 24001
+state: draft
+created: TBD
+placement:
+  category: gcp
+---
+
+# Empty Objects
+
+Fields of type Message **must not** be empty. Empty messages do not have uniform
+
+## Alternatives
+
+The presence of empty Messages are sometimes used to indicate that a flag is enabled. Alternatives to empty Messages could include a single boolean field within the Message to signify enablement or an Enum rather than an empty Message.
+
+### Add Field to Message
+For example:
+```proto
+message EnableMyFeature {
+}
+```
+Could be modeled instead as:
+
+```proto
+message MyFeature {
+  bool enabled = 1;
+}
+```
+
+### Move Option to Top-Level Enum
+
+For a situation where the presence of an empty Message indicates a certain option is being chosen, an alternative is to choose the option via an enum rather than the presence of a particular object.
+
+For example:
+```proto
+oneof access_model {
+  AccessModelFree free = 1
+  AccessModelQuota quota = 2
+}
+
+message AccessModelFree {
+}
+
+message AccessModelQuota {
+  int32 requests_per_day = 1;
+}
+```
+
+Could be modeled instead as:
+```proto
+enum AccessModel {
+  UNSPECIFIED = 0;
+  FREE = 1;
+  QUOTA = 1;
+}
+
+message AccessModelQuota {
+  int32 requests_per_day = 1;
+}
+```
+
+
+## Changelog
+
+- **TBD**: Created

From 4d12d8d08fadcd18aeb655b4ad925c5ae3a14e70 Mon Sep 17 00:00:00 2001
From: Sam Levenick <slevenick@google.com>
Date: Tue, 25 Oct 2022 18:46:22 -0700
Subject: [PATCH 2/2] Rename 25001

---
 aip/cloud/{24001.md => 25001.md} | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 rename aip/cloud/{24001.md => 25001.md} (99%)

diff --git a/aip/cloud/24001.md b/aip/cloud/25001.md
similarity index 99%
rename from aip/cloud/24001.md
rename to aip/cloud/25001.md
index 43b33169c5..21bf86efda 100644
--- a/aip/cloud/24001.md
+++ b/aip/cloud/25001.md
@@ -1,5 +1,5 @@
 ---
-id: 24001
+id: 25001
 state: draft
 created: TBD
 placement: