code: def ConvCnstrMODMaskOptionsDefaults(method='fista'):
      
  
      dflt = copy.deepcopy(ccmodmsk_class_label_lookup(method).Options.defaults)
      if method == 'fista':
          dflt.update({'MaxMainIter': 1, 'BackTrack':
                       {'gamma_u': 1.2, 'MaxIter': 50}})
      else:
          dflt.update({'MaxMainIter': 1, 'AutoRho':
                       {'Period': 10, 'AutoScaling': False,
                        'RsdlRatio': 10.0, 'Scaling': 2.0,
                        'RsdlTarget': 1.0}})
      return dflt
docs: Get defaults dict for the ConvCnstrMODMask class specified by the
      ``method`` parameter.