diff --git a/01.workspace/heave/src/str/entity.rs b/01.workspace/heave/src/str/entity.rs
index e1a57f0..3874934 100644
--- a/01.workspace/heave/src/str/entity.rs
+++ b/01.workspace/heave/src/str/entity.rs
@@ -2,6 +2,8 @@ use crate::*;
 
 #[derive(Debug, Default, PartialEq, Clone)]
 pub struct O {
+    pub persisted: bool,
+    pub loaded: bool,
     pub id: String,
     pub class: String,
     pub attributes: std::collections::HashMap<String, Attribute>,
@@ -57,4 +59,10 @@ impl O {
         let value = self.value_of(id).unwrap();
         T::from(value.clone())
     }
+    pub fn persist(&self) {
+        todo!()
+    }
+    pub fn load(_id: &str) -> Self {
+        todo!()
+    }
 }