module ActiveSupport::Callbacks::ClassMethods

def deprecated_false_terminator # :nodoc:
  Proc.new do |target, result_lambda|
    terminate = true
    catch(:abort) do
      result = result_lambda.call if result_lambda.is_a?(Proc)
      if Callbacks.halt_and_display_warning_on_return_false && result == false
        display_deprecation_warning_for_false_terminator
      else
        terminate = false
      end
    end
    terminate
  end
end