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//@ check-pass
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use std::cell::RefCell;
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use std::rc::Rc;
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pub struct Callbacks {
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callbacks: Vec<Rc<RefCell<dyn FnMut(i32)>>>,
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}
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impl Callbacks {
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pub fn register<F: FnMut(i32)+'static>(&mut self, callback: F) {
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self.callbacks.push(Rc::new(RefCell::new(callback)));
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}
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}
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fn main() {}
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