module Roda::RodaPlugins::Base::ClassMethods

it would cause some plugins to break.
Note that freezing the class prevents you from subclassing it, mostly because

be raised if you try to modify the internal state after calling this.
internal state at runtime anyway, but this makes sure an exception will
It's optional to call this method, as nothing should be modifying the
Freeze the internal state of the class, to avoid thread safety issues at runtime.

def freeze
  @opts.freeze
  @middleware.freeze
  super
end