code: def clear_data(self):
          '''
          Free memory
          If many trees are grown this is an useful options since it is saving a
          lot of memory '''
          if self.forest.verbose > 1:
              print('clearing up stuff')
          self.S = None
          self.Uy = None
          self.U = Nonf clear_data(self):
          '''
          Free memory
          If many trees are grown this is an useful options since it is saving a
          lot of memory '''
          if self.forest.verbose > 1:
              print('clearing up stuff')
          self.S = None
          self.Uy = None
          self.U = None
docs: Free memory
          If many trees are grown this is an useful options since it is saving a
          lot of memory