module Mongoid::Config::DeprecatedOptions

def self.prepended(klass)
  klass.class_eval do
    OPTIONS.each do |option|
      alias_method :"#{option}_without_deprecation=", :"#{option}="
      define_method(:"#{option}=") do |value|
        Mongoid::Warnings.send(:"warn_#{option}_deprecated")
        send(:"#{option}_without_deprecation=", value)
      end
    end
  end
end