Method check

src/darkbird/router.rs:221–231

Check channel to registered before

(&self, chan: &Sender<Msg>)

    /// Check channel to registered before
    fn check(&self, chan: &Sender<Msg>) -> Result<(), ()> {
        for (_index, dst) in self.channels.iter().enumerate() {
            
            // if channel was same
            if chan.same_channel(dst) {
                return Err(())
            }

        }
        Ok(())
    }
}