[Rust] Creature class

pub struct Creature {
    priority: i32,
    // Other fields omitted.
}

impl Creature {
    pub fn new() -> Creature {
        Creature{ priority: 0 }
    }
}

impl Priority for Creature {
     fn get_priority(&self) -> i32 {
         self.priority
     }

     fn set_priority(&mut self, value: i32) {
         self.priority = value;
     }
}