fix trait

Author: ProjektGopher

packages/adverbs/src/Traits/HasVerbsState.php

@@ -12,10 +12,19 @@ trait HasVerbsState
     /**
      * Get the state class for this model.
      */
-    protected function getVerbsState(): string
+    protected function getStateClass(): string
     {
+        throw_if(
+            condition: empty($this->state_class),
+            exception: 'State class is not set',
+        );
+
         $state = $this->state_class;
-        throw_if(! class_exists($state), 'Unknown class '.$this->verbs_state);
+        
+        throw_if(
+            condition: ! class_exists($state),
+            exception: 'Unknown class '.$state,
+        );
 
         return $state;
     }