Twenty_Eleven_Ephemera_Widget::update( array $new_instance, array $old_instance ): array<string,

164	public function update( $new_instance, $old_instance ) {165		$instance           = $old_instance;166		$instance['title']  = strip_tags( $new_instance['title'] );167		$instance['number'] = (int) $new_instance['number'];168		$this->flush_widget_cache();169 170		$alloptions = wp_cache_get( 'alloptions', 'options' );171		if ( isset( $alloptions['widget_twentyeleven_ephemera'] ) ) {172			delete_option( 'widget_twentyeleven_ephemera' );173		}174 175		return $instance;176	}