old_contents: class Transformer(object):
  
      class Feats():
          exclude = None
  
      def __init__(self):
          for field in self.get_feats():
              getattr(self.Feats, field).bind(field, self)
  
      def get_feats(self):
          return [x for x in dir(self.Feats) if not (x.startswith('__') or x in ['exclude'] )]
  
      def default(self, feat):
          return [feat]
  
new_contents: class Transformer(object):
      class Feats():
          exclude = None
  
      def __init__(self):
          for field in self.get_feats():
              getattr(self.Feats, field).bind(field, self)
  
      def get_feats(self):
          return [x for x in dir(self.Feats) if not (x.startswith('__') or x in ['exclude'])]
  
      def get_transformer_func(self, feat_name):
          return getattr(self.Feats, feat_name).transform
  
subject: Add get_transformer_func