artembilan/spring-integration — comment on commit 48993a50a44d85edc299eedf431a8bd6f63d3b63
File: spring-integration-groovy/src/main/java/org/springframework/integration/groovy/config/GroovyControlBusFactoryBean.java line 98
By garyrussell:

In the previous implementation, a bean called 'headers' will override the message headers; in this implementation, BeanFactoryBinding the message headers will always be returned.

I am not saying it's wrong, but it's a change of behavior.