def transform_external(self, external_url):
return filestack.models.Transform(apikey=self.apikey, security=self.security, external_url=external_url)<EOL>
Turns an external URL into a Filestack Transform object

*returns* [Filestack.Transform]

```python
from filestack import Client, Filelink

client = Client("API_KEY")
transform = client.transform_external('http://www.example.com')
```