anchor.diff:  Default: `-1`.
   
   ==== Producer Properties
  +
  +These properties are exposed via `org.springframework.cloud.stream.binder.ProducerProperties`
   
   The following binding properties are available for output bindings only and must be prefixed with `spring.cloud.stream.bindings.<channelName>.producer.` (for example, `spring.cloud.stream.bindings.input.producer.partitionKeyExpression=payload.id`).
   
  
positive.code: 
  === Binder Configuration Properties
  
  The following properties are available when creating custom binder configurations.
  They must be prefixed with `spring.cloud.stream.binders.<configurationName>`.
  
  type::
  
negative.code: 
  ==== Consumer Properties
  
  These properties are exposed via `org.springframework.cloud.stream.binder.ConsumerProperties`
  
  The following binding properties are available for input bindings only and must be prefixed with `spring.cloud.stream.bindings.<channelName>.consumer.` (for example, `spring.cloud.stream.bindings.input.consumer.concurrency=3`).
  
  Default values can be set by using the `spring.cloud.stream.default.consumer` prefix (for example, `spring.cloud.stream.default.consumer.headerMode=none`).
  