class_docstr: An abstract base class for a model that implements lipschitz
  constants
  
  Parameters
  ----------
  dtype : `{'float64', 'float32'}`, default='float64'
      Type of the arrays used. This value is set from model and prox dtypes.
  
  Notes
  -----
  This class should be not used by end-users, it is intended for
  development only.
code: def fit(self, *args):
      self._set("_ready_lip_best", False)
  
file_path: tick/tick/base_model/model_lipschitz.py
imports: from abc import abstractmethod
  from .None import Model
label_desc: Use image node_id 2 for calling the ModelLipschitz obj's underlying member method code with example usage: obj.fit() without return types