ScriptableWizard Problem with LoadAssetAtPath

I'm getting error messages when trying to use this bit of code in a C# editor script - ScriptableWizard. The code is from the Unity script reference for "EditorUtility.InstantiatePrefab"

I'm new to scripting, especially for the editor, so not sure how to solve this.

Part of my code:

         string localPath = "Assets/Prefabs/prefab_" + prefab.name.ToLower() + ".prefab";
     
 line 69 if (AssetDatabase.LoadAssetAtPath( localPath, GameObject))
         {
             if (EditorUtility.DisplayDialog("Are you sure?", "The prefab already exists. Do you want to overwrite it?", "Yes", "No"))
             {
             Debug.Log("File does exist already");
             }
         }
         else
         {
             Debug.Log("File didn't exist already");
         }        

Errors in Unity:

Assets/Editor/CreatePrefabFromModels.cs(69,63): error CS0119: Expression denotes a type', where a variable', value' or method group' was expected

Assets/Editor/CreatePrefabFromModels.cs(69,35): error CS1502: The best overloaded method match for UnityEditor.AssetDatabase.LoadAssetAtPath(string, System.Type)' has some invalid arguments Assets/Editor/CreatePrefabFromModels.cs(69,35): error CS1503: Argument #2' cannot convert object' expression to type System.Type'