Moose roles to summarize the message of an object

 Role::HasMessage is a simple Moose role that provides a method called message
 that returns a string summarizing the message or event represented by an
 object.
 .
 This distribution also provides the Role::HasMessage::Errf module, which is
 an implementation of Role::HasMessage that uses String::Errf to format
 sprintf-like message strings. It adds a message_fmt attribute, initialized by
 the message argument.