NewWrapper creates a Version Wrapper around a Broker Controller.

WithDefaultVersion lets add a default version to tag messages that don't have versions tagged.

WithLogger lets add a logger to the Wrapper struct.

WithVersionHeaderKey lets use a different version header key to add application version to published messages and retrieve it from received messages.

DefaultVersionHeaderKey is the field that will be added to a message to get the version.

ErrNoVersion happens when there is no version in the context or the message.

Wrapper allows to use multiple version of the same App/User Controllers on one Broker Controller in order to handle migrations.

WrapperOption adds an option to Version Wrapper.