swap out the input types to hopefully trigger an evaluation error - unfortunately does not seem to work yet

allowed fixing a few types, tho bad input types still work, and needs
commenting readOnly

deployment/data-model-test.nix

@@ -182,10 +182,10 @@ in
           };
         deployment = {
           inherit (result) _type;
-          isModule = lib.isFunction fediversity.deployments.example.deployment;
           deploymentFunction = lib.isFunction result.deploymentFunction;
           getProviders = lib.isFunction result.getProviders;
         };
+        deploy = lib.isFunction fediversity.deployments.example.deployment;
       };
     expected = {
       number-of-resources = 1;
@@ -205,7 +205,6 @@ in
         _type = "nixops4Deployment";
         deploymentFunction = true;
         getProviders = true;
-        isModule = false;
       };
     };
   };