Specify the location for accessing the model

// ...

// Initialize the Vertex AI Gemini API backend service
// Specify the location for where you want to access the model
let ai = FirebaseAI.firebaseAI(backend: .vertexAI(location: "LOCATION"))

// Create a `GenerativeModel` instance with a model that supports your use case
let model = ai.generativeModel(modelName: "MODEL_NAME")

// ...

// ...

// Initialize the Vertex AI Gemini API backend service
// Specify the location for where you want to access the model
val model = Firebase.ai(backend = GenerativeBackend.vertexAI(location = "LOCATION"))
                        .generativeModel("MODEL_NAME")

// ...

// ...

// Initialize the Vertex AI Gemini API backend service
// Specify the location for where you want to access the model
GenerativeModel ai = FirebaseAI.getInstance(GenerativeBackend.vertexAI("LOCATION"))
        .generativeModel("MODEL_NAME");

GenerativeModelFutures model = GenerativeModelFutures.from(ai);

// ...

// ...

// Initialize FirebaseApp
const firebaseApp = initializeApp(firebaseConfig);

// Initialize the Vertex AI Gemini API backend service
// Specify the location for where you want to access the model
const ai = getAI(firebaseApp, { backend: new VertexAIBackend('LOCATION') });

// Create a `GenerativeModel` instance with a model that supports your use case
const model = getGenerativeModel(ai, { model: 'MODEL_NAME' });

// ...

// ...

// Initialize the Vertex AI Gemini API backend service
// Specify the location for where you want to access the model
final ai = await FirebaseAI.vertexAI(location: 'LOCATION');

// Create a `GenerativeModel` instance with a model that supports your use case
final model = ai.generativeModel(model: 'MODEL_NAME');

// ...

// ...

// Initialize the Vertex AI Gemini API backend service
// Specify the location for where you want to access the model
var ai = FirebaseAI.GetInstance(FirebaseAI.Backend.VertexAI(location: "LOCATION"));

// Create a `GenerativeModel` instance with a model that supports your use case
var model = ai.GetGenerativeModel(modelName: "MODEL_NAME");

// ...