docstr: Refit the model if already fitted.
docstr_tok: ["Refit","the","model","if","already","fitted","."]
code: def refit(self):
      """Refit the model if already fitted."""
      if self.fitted:
          self.fit()
  
imports: import matplotlib
  from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
  import sys
  import tkinter
  import numpy
  from matplotlib.contour import ContourSet
  from matplotlib.figure import Figure
  from sklearn import svm
  from sklearn.datasets import dump_svmlight_file
label_desc: Use image node_id 6 for calling the Controller obj's underlying member method code with example usage: obj.refit() without return types