code: def test_validate_with_invalid_model(
      self, google_vertexai: GoogleVertexAI
  ):
      google_vertexai.model = "invalid-model"
      with pytest.raises(
          UnsupportedModelError,
          match=(
              "Unsupported model: The model 'invalid-model' doesn't exist "
              "or is not supported yet."
          ),
      ):
          google_vertexai._generate_text("Test prompt")
  
file_path: pandas-ai/tests/llms/test_google_vertexai.py
imports: import pytest
  from pandasai.llm import GoogleVertexAI
  from pandasai.exceptions import UnsupportedModelError
label_desc: Use image node_id 5 for calling the TestGoogleVertexAI obj's underlying member method code with example usage: obj.test_validate_with_invalid_model(google_vertexai) without return types