Describe the bug
RequestBody.toString() doesn't provide any usable information

To Reproduce
Steps to reproduce the behavior:

1. Create an Interceptor
2. Override the onRequest method
3. Try to log the RequestBody

Expected behavior
Something... usable.

Environmental Data:

• Java Version: Adopt OpenJDK 11.0.8.10
• Version: 3.11.02

Additional context
The problem is that it's almost impossible to disect the object. It potentially has things like Multi/Uniparts, or some basic fields.
That's exactly the type of body I want to log. Is there any example on how to log the fields set by the .field() function?