Lambdas (introduced with Java 8) are a very convenient and compact way to inject a behavior without having to create a dedicated class or method. But those lambdas should be used only if the behavior to be injected can be defined in a few lines of code, otherwise the source code can quickly become unreadable. ifdef::env-github,rspecator-view[] ''' == Implementation Specification (visible only on this page) include::message.adoc[] include::parameters.adoc[] ''' == Comments And Links (visible only on this page) include::comments-and-links.adoc[] endif::env-github,rspecator-view[]