Extending Guzzle\Client is deprecated since Guzzle 7.1 and the class is annotated as @final. The class will be actually final in Guzzle 8.0. See [guzzle issue#2521](https://github.com/guzzle/guzzle/issues/2521)
Extending Guzzle\Client is deprecated since Guzzle 7.1 and the class is annotated as @Final. The class will be actually final in Guzzle 8.0.
See guzzle issue#2521