NServiceBus/NServiceBus — comment on commit afec46f7c70b6aedb0faa54d9ed9706f196fa5d5
File: src/gateway/NServiceBus.Gateway/Config/ConfigureGateway.cs line 64
By andreasohlund:

That is just setting what default is used. Look at the gatewatdefaults class that invokes it. The check is there!