old_contents: class OdkCalculate:
      def __init__(self, row):
          self.row = row
  
      def to_html(self):
          return ""
  
      def to_text(self):
          return ""
  
      def __repr__(self):
          return '<OdkCalculate {}>'.format(self.row['name'])
  
new_contents: class OdkCalculate:
      def __init__(self, row):
          self.row = row
  
      def to_html(self, *args, **kwargs):
          return ""
  
      def to_text(self, *args, **kwargs):
          return ""
  
      def __repr__(self):
          return '<OdkCalculate {}>'.format(self.row['name'])
  
subject: Update signature of to_text and to_html