# File lib/merb-core/controller/abstract_controller.rb, line 290
  def _filter_condition_met?(rule)
    # Both:
    # * no :if or the if condition evaluates to true
    # * no :unless or the unless condition evaluates to false
    (!rule.key?(:if) || _evaluate_condition(rule[:if])) &&
    (!rule.key?(:unless) || ! _evaluate_condition(rule[:unless]))
  end