Add inspect

Signed-off-by: Marcel Müller <neikos@neikos.email>

crates/tytix-core/src/lib.rs

@@ -41,6 +41,10 @@ impl InternalMessage {
             })
     }
 
+    pub fn as_ref<M: Any>(&self) -> Option<&M> {
+        self.value.downcast_ref()
+    }
+
     pub fn type_name(&self) -> &'static str {
         self.name
     }