code: def _zero(self):
      self.area = 0
      self.meanX = 0
      self.meanY = 0
      self.varianceX = 0
      self.varianceY = 0
      self.stddevX = 0
      self.stddevY = 0
      self.covariance = 0
      self.correlation = 0
      self.slant = 0
  
imports: from math import sqrt, degrees, atan
  from fontTools.pens.basePen import BasePen, OpenContourError
  from fontTools.pens.momentsPen import MomentsPen
label_desc: Use image node_id 2 for calling the StatisticsBase obj's underlying member method code with example usage: obj._zero() without return types