ConditionExpressionInterface.php

<?php

namespace Drupal\rules\Engine;


/**
 * Defines the interface for Rules expressions that can be used as conditions.
 */
interface ConditionExpressionInterface extends ExpressionInterface {
    
    /**
     * Negates the result after evaluating this condition.
     *
     * @param bool $negate
     *   TRUE to indicate that the condition should be negated, FALSE otherwise.
     *
     * @return $this
     */
    public function negate($negate = TRUE);
    
    /**
     * Determines whether condition result will be negated.
     *
     * @return bool
     *   Whether the condition result will be negated.
     */
    public function isNegated();

}