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Edit File: ValueInterface.php

<?php namespace WPDesk\FCF\Free\Integration; /** * . */ interface ValueInterface { /** * Returns value of order field. * * @param string $field_key Field key. * @param int $order_id ID of WC_Order. * * @return mixed Value of field, or null if not exists. */ public function get_field_value( string $field_key, int $order_id ); }