Crate rewrite_impl_trait 

Converts any impl Trait in traits, impl blocks, or bare functions into method generics

This can be used to work around language issues with impl Trait, such as a lack of support in type aliases. It also allows trait mocking with mockall, for traits that use impl Trait in arguments.

Attribute Macros

into_generic

Rewrites impl Trait into a method generic on functions, trait definitions, and trait implementations.