RsBundle  Diff

                        return Err(Error::InvalidVariable(index, self.bounds.len()));
                    }
                    let (lower, upper) = self.bounds[index];
                    if value < lower || value > upper {
                        return Err(Error::ViolatedBounds(lower, upper, value));
                    }
                    newvars.push((Some(index), lower - value, upper - value, value));
                    unimplemented!()
                }
            }
        }

        if !newvars.is_empty() {
            let mut problem = &mut self.problem;
            let minorants = &self.minorants;
            self.master.add_vars(&newvars.iter().map(|v| (v.1, v.2)).collect::<Vec<_>>(),
            self.master.add_vars(&newvars.iter().map(|v| (v.0, v.1, v.2)).collect::<Vec<_>>(),
                                 &mut move |fidx, minidx, vars| {
                                     problem.extend_subgradient(minorants[fidx][minidx].primal.as_ref().unwrap(), vars)
                                         .map(DVector)
                                         .unwrap()
                                 });
            // modify moved variables
            for (index, val) in newvars.iter().filter_map(|v| v.0.map(|i| (i, v.3))) {