Theme_Upgrader::current_after() WordPress Method

	public function current_after( $response, $theme ) {
		if ( is_wp_error( $response ) ) {
			return $response;
		}

		$theme = isset( $theme['theme'] ) ? $theme['theme'] : '';

		// Only run if active theme.
		if ( get_stylesheet() !== $theme ) {
			return $response;
		}

		// Ensure stylesheet name hasn't changed after the upgrade:
		if ( get_stylesheet() === $theme && $theme !== $this->result['destination_name'] ) {
			wp_clean_themes_cache();
			$stylesheet = $this->result['destination_name'];
			switch_theme( $stylesheet );
		}

		// Time to remove maintenance mode. Bulk edit handles this separately.
		if ( ! $this->bulk ) {
			$this->maintenance_mode( false );
		}
		return $response;
	}