Transformer allows changes to the request/response data before it is sent/received to/from the server.
Dio has already implemented a DefaultTransformer, and as the default Transformer. If you want to custom the transformation of request/response data, you can provide a Transformer by your self, and replace the DefaultTransformer by setting the dio.Transformer.
Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
) → String
Returns a string representation of this object.
RequestOptions options) → Future< String>
transformRequestallows changes to the request data before it is sent to the server, but after the
RequestOptions options, ResponseBody response) → Future
transformResponseallows changes to the response data before it is passed to