141 		return wp_using_ext_object_cache() ? false : wp_cache_flush();

   141 		if ( ! wp_cache_supports( 'flush_runtime' ) ) {

   142 	}

   142 			_doing_it_wrong(

   143 endif;

   143 				__FUNCTION__,

   144 				__( 'Your object cache implementation does not support flushing the in-memory runtime cache.' ),

   145 				'6.1.0'

   146 			);

   147 

   148 			return false;

   149 		}

   150 

   151 		return wp_cache_flush();

   152 	}

   153 endif;

   154 

   155 if ( ! function_exists( 'wp_cache_flush_group' ) ) :

   156 	/**

   157 	 * Removes all cache items in a group, if the object cache implementation supports it.

   158 	 *

   159 	 * Before calling this function, always check for group flushing support using the

   160 	 * `wp_cache_supports( 'flush_group' )` function.

   161 	 *

   162 	 * @since 6.1.0

   163 	 *

   164 	 * @see WP_Object_Cache::flush_group()

   165 	 * @global WP_Object_Cache $wp_object_cache Object cache global instance.

   166 	 *

   167 	 * @param string $group Name of group to remove from cache.

   168 	 * @return bool True if group was flushed, false otherwise.

   169 	 */

   170 	function wp_cache_flush_group( $group ) {

   171 		global $wp_object_cache;

   172 

   173 		if ( ! wp_cache_supports( 'flush_group' ) ) {

   174 			_doing_it_wrong(

   175 				__FUNCTION__,

   176 				__( 'Your object cache implementation does not support flushing individual groups.' ),

   177 				'6.1.0'

   178 			);

   179 

   180 			return false;

   181 		}

   182 

   183 		return $wp_object_cache->flush_group( $group );

   184 	}

   185 endif;

   186 

   187 if ( ! function_exists( 'wp_cache_supports' ) ) :

   188 	/**

   189 	 * Determines whether the object cache implementation supports a particular feature.

   190 	 *

   191 	 * @since 6.1.0

   192 	 *

   193 	 * @param string $feature Name of the feature to check for. Possible values include:

   194 	 *                        'add_multiple', 'set_multiple', 'get_multiple', 'delete_multiple',

   195 	 *                        'flush_runtime', 'flush_group'.

   196 	 * @return bool True if the feature is supported, false otherwise.

   197 	 */

   198 	function wp_cache_supports( $feature ) {

   199 		return false;

   200 	}

   201 endif;