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Edit File: V_3_6_5.php

<?php namespace WeDevs\Dokan\Upgrade\Upgrades; use WeDevs\Dokan\Abstracts\DokanUpgrader; use WeDevs\Dokan\Cache; class V_3_6_5 extends DokanUpgrader { /** * Delete product category cache * * @since 3.6.5 * * @return void */ public static function clear_multistep_category_cache() { if ( function_exists( 'wpml_get_active_languages' ) ) { foreach ( wpml_get_active_languages() as $active_language ) { $transient_key = 'multistep_categories_' . $active_language['code']; Cache::delete_transient( $transient_key ); } } Cache::delete_transient( 'multistep_categories' ); } }