serializer:
serialize_null: true
format_listener:
rules:
- { path: '^/', priorities: ['json'], fallback_format: 'json' }
param_fetcher_listener: force
serializer:
serialize_null: true
format_listener:
rules:
- { path: '^/', priorities: ['json'], fallback_format: 'json' }
param_fetcher_listener: force