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/// Interface for working with sortable messages pub trait Sortable { type Sort: Ord; /// Get message sort key. It's used for message prioritization in queue. /// /// ``` /// use spartan_lib::core::message::builder::MessageBuilder; /// use spartan_lib::core::payload::Sortable; /// /// let message = MessageBuilder::default().body("Hello, world").compose().unwrap(); /// /// dbg!(message.sort()); /// ``` fn sort(&self) -> Self::Sort; }