Theme_Upgrader::current_before( bool|WP_Error $response, array $theme ): bool|WP_Error

683	public function current_before( $response, $theme ) {684		if ( is_wp_error( $response ) ) {685			return $response;686		}687 688		$theme = $theme['theme'] ?? '';689 690		// Only run if active theme.691		if ( get_stylesheet() !== $theme ) {692			return $response;693		}694 695		// Change to maintenance mode. Bulk edit handles this separately.696		if ( ! $this->bulk ) {697			$this->maintenance_mode( true );698		}699 700		return $response;701	}