transformRequest method of searchBase (React native searchbox) not working

**Describe the bug**
I was trying to modify request in transformRequest method of searchBase but it looks like the method is not executing.
Can anyone tell if that's working? If not why we have that method if that's not working.

**Expected behavior**
transformRequest method should execute before the execution of any request inside the searchBase component if transformRequest is passed with the method to execute.

Start by locating the React Native searchbox's searchBase component and its transformRequest method. Trace the request execution path to verify whether the callback runs before each request, then confirm that a passed transformRequest is invoked as described in the expected behavior.

Written by the indexing model from the issue text.