CloudEventHeaderEnricher (Spring Cloud Function Parent 3.2.12 API)

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface CloudEventHeaderEnricher
```
Strategy that should be implemented by the user to help with outgoing Cloud Event headers.

NOTE: The provided instance of CloudEventMessageBuilder may or may not be initialized with default values, so it is the responsibility of the user to ensure that all required Cloud Events attributes are set. That said, Spring frameworks which utilize this interface will ensure that the provided CloudEventMessageBuilder is initialized with default values, leaving you responsible to only set the attributes you need.
Once implemented, simply configure it as a bean and the framework will invoke it before the outbound Cloud Event Message is finalized.
```
 @Bean
 public CloudEventHeaderEnricher cloudEventHeaderEnricher() {
  return headers -> {
   return headers.setSource("https://interface21.com/").setType("com.interface21");
  };
 }
 
```
Since:

3.1

Author:

Oleg Zhurakousky, Dave Syer

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`CloudEventMessageBuilder<?>`	`enrich(CloudEventMessageBuilder<?> messageBuilder)`	Will provide access to an open instance of `CloudEventMessageBuilder` so you can add additional attributes and headers.

- Method Detail
  - enrich
```
CloudEventMessageBuilder<?> enrich(CloudEventMessageBuilder<?> messageBuilder)
```
    Will provide access to an open instance of CloudEventMessageBuilder so you can add additional attributes and headers.
    
    Parameters:
    
    messageBuilder - open instance of CloudEventMessageBuilder
    
    Returns:
    
    instance of CloudEventMessageBuilder