code: def hdrval(cls):
          
  
          hdrmap = {'Itn': 'Iter'}
          hdrmap.update(cls.hdrval_objfun)
          hdrmap.update({'r': 'PrimalRsdl', 's': 'DualRsdl', u('ρ'): 'Rho'})
          return hdrmap
docs: Construct dictionary mapping display column title to
          IterationStats entries.