What was the need to do it in such a way?

[krshna-dtdl]

https://github.com/OpenFeign/feign/blob/aded5d5ac7f0cd7c57722c9aa9e5c9539783a897/core/src/main/java/feign/BaseBuilder.java#L252

In previous version of this file we were not cloning it. We were directly changing.

[kdavisk6]

See #2117