Tower is a crate of “modular and reusable components for building robust networking clients and servers” widely used in prominent projects within the Rust ecosystem, including Hyper*, Axum, or Tonic. This ubiquity means Rust developers invariably engage with the Service trait, Tower's core abstraction, while working with these libraries. Despite its conciseness, reading and understanding code that abstracts over the Service trait proves challenging because of the heavy use of generics and intric

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