RsBundle  Diff

        let new_weight = self.weighter.weight(&current_state!(self, Step::Null), &self.params);
        self.master.set_weight(new_weight);
        self.cnt_null += 1;
        debug!("Null Step");
    }

    /// Perform one bundle iteration.
    #[cfg_attr(feature = "cargo-clippy", allow(collapsible_if))]
    pub fn step(&mut self) -> Result<Step> {
        self.iterinfos.clear();

        if !self.cur_valid {
            // current point needs new evaluation
            try!(self.init_master());
        }