apply_filters( 'icon_dirs', string[] $uris )

7153			 * Filters the array of icon directory URIs.7154			 *7155			 * @since 2.5.07156			 *7157			 * @param string[] $uris Array of icon directory URIs keyed by directory absolute path.7158			 */7159			$dirs       = apply_filters( 'icon_dirs', array( $icon_dir => $icon_dir_uri ) );7160			$icon_files = array();7161			$all_icons  = array();7162			while ( $dirs ) {7163				$keys = array_keys( $dirs );7164				$dir  = array_shift( $keys );7165				$uri  = array_shift( $dirs );