*
* @param string $directory Directory to search in, relative to $IP, must be either "extensions"
* or "skins"
- * @return array [ $extName => [ 'screenshots' => [ '...' ] ]
+ * @return array[][] [ $extName => [ 'screenshots' => [ '...' ] ]
*/
public function findExtensions( $directory = 'extensions' ) {
switch ( $directory ) {