code: def eval_objfn(self):
          
  
          fval = self.obfn_f(self.obfn_fvar())
          g0val = self.obfn_g0(self.obfn_g0var())
          g1val = self.obfn_g1(self.obfn_g1var())
          obj = fval + g0val + g1val
          return (obj, fval, g0val, g1val)
docs: Compute components of objective function as well as total
          contribution to objective function.