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Editing: WorkflowRuleTarget.php

<?php

namespace Twilio\TaskRouter;

/**
 * Twilio TaskRouter Workflow Rule Target
 *
 * @author Justin Witz <jwitz@twilio.com>
 * @license  http://creativecommons.org/licenses/MIT/ MIT
 */
class WorkflowRuleTarget implements \JsonSerializable {
    public $queue;
    public $expression;
    public $priority;
    public $timeout;

public function __construct(string $queue, int $priority = null, int $timeout = null, string $expression = null) {
        $this->queue = $queue;
        $this->priority = $priority;
        $this->timeout = $timeout;
        $this->expression = $expression;
    }

public function jsonSerialize(): array {
        $json = [];
        $json['queue'] = $this->queue;
        if ($this->priority !== null) {
            $json['priority'] = $this->priority;
        }
        if ($this->timeout !== null) {
            $json['timeout'] = $this->timeout;
        }
        if ($this->expression !== null) {
            $json['expression'] = $this->expression;
        }
        return $json;
    }
}

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