interface ContextualValidatorInterface

interface ContextualValidatorInterface extends ContextualValidatorInterfaceBase {
    
    /**
     * Validates a value against a constraint or a list of constraints.
     *
     * If no constraint is passed, the constraint
     * \Symfony\Component\Validator\Constraints\Valid is assumed.
     *
     * @param mixed $value
     *   The value to validate
     * @param \Symfony\Component\Validator\Constraint|\Symfony\Component\Validator\Constraint[] $constraints
     *   The constraint(s) to validate against.
     * @param array|null $groups
     *   The validation groups to validate, defaults to "Default".
     * @param bool $is_root_call
     *   (optional) Whether its the most upper call in the typed data tree.
     *
     * @see \Symfony\Component\Validator\Constraints\Valid
     *
     * @return $this
     */
    public function validate($value, $constraints = NULL, $groups = NULL, $is_root_call = TRUE);

}