old_contents: from rest_framework import serializers
  
  from bulbs.super_features.fields import RichTextField
  
  
  class EntrySerializer(serializers.Serializer):
      copy = RichTextField(required=True, field_size="long")
  
  
  class GuideToSerializer(serializers.Serializer):
      entries = EntrySerializer(many=True, required=False)
  
new_contents: from rest_framework import serializers
  
  from bulbs.super_features.fields import RichTextField
  
  
  class CopySerializer(serializers.Serializer):
      copy = RichTextField(required=True, field_size="long")
  
  
  class EntrySerializer(CopySerializer, serializers.Serializer):
      title = RichTextField(field_size="short")
  
  
  class GuideToSerializer(serializers.Serializer):
      entries = EntrySerializer(many=True, required=False)
  
subject: move around serializers