code: def getFieldMin(self, fieldName):
      
      stats = self.getStats()
      if stats == None:
        return None
      minValues = stats.get('min', None)
      if minValues == None:
        return None
      index = self.getFieldNames().index(fieldName)
      return minValues[index]
docs: If underlying implementation does not support min/max stats collection,
      or if a field type does not support min/max (non scalars), the return
      value will be None.
  
      :param fieldName: (string) name of field to get min
      :returns: current minimum value for the field ``fieldName``.