diff --git a/examples/example-types/src/lib.rs b/examples/example-types/src/lib.rs
index 5102ec7..aeb3a0c 100644
--- a/examples/example-types/src/lib.rs
+++ b/examples/example-types/src/lib.rs
@@ -1,5 +1,6 @@
 use apub::{
-    deliver::Activity,
+    activitypub::{Activity, DeliverableObject, Object},
+    deliver::Deliverable,
     repo::{Dereference, Repo},
     session::Session,
 };
@@ -26,6 +27,46 @@ pub struct AcceptedActivity {
 
     #[serde(rename = "type")]
     kind: ActivityType,
+
+    to: Vec<Url>,
+
+    cc: Vec<Url>,
+
+    actor: Url,
+
+    object: Url,
+}
+
+impl Object for AcceptedActivity {
+    type Kind = ActivityType;
+
+    fn id(&self) -> &Url {
+        &self.id
+    }
+
+    fn kind(&self) -> &Self::Kind {
+        &self.kind
+    }
+}
+
+impl DeliverableObject for AcceptedActivity {
+    fn to(&self) -> &[Url] {
+        &self.to
+    }
+
+    fn cc(&self) -> &[Url] {
+        &self.cc
+    }
+}
+
+impl Activity for AcceptedActivity {
+    fn actor_id(&self) -> &Url {
+        &self.actor
+    }
+
+    fn object_id(&self) -> &Url {
+        &self.object
+    }
 }
 
 impl AcceptedActivity {
@@ -101,7 +142,7 @@ impl Dereference for ObjectId<NoteType> {
     type Output = Note;
 
     fn url(&self) -> &Url {
-        &self
+        self
     }
 }
 
@@ -123,4 +164,4 @@ where
     }
 }
 
-impl Activity for Note {}
+impl Deliverable for Note {}