code: def __del__(self):
      if self.model is not None:
          thundersvm.model_free(c_void_p(self.model))
  
imports: from sklearn.base import BaseEstimator
  from sklearn.base import RegressorMixin, ClassifierMixin
  import numpy
  import scipy.sparse
  from sklearn.utils import check_X_y, column_or_1d, check_array
  from sklearn.utils.validation import _num_samples
  from ctypes import *
  from os import path, curdir
  from sys import platform
label_desc: Use image node_id 2 for calling the SvmModel obj's underlying member method code with example usage: obj.__del__() without return types