cache_get example

// Correct a situation where the theme is 'some-directory/some-theme' but 'some-directory' was passed in as part of the theme root instead.         if ( ! in_array( $theme_root, (array) $wp_theme_directories, true )
            && in_array( dirname( $theme_root ), (array) $wp_theme_directories, true )
        ) {
            $this->stylesheet = basename( $this->theme_root ) . '/' . $this->stylesheet;
            $this->theme_root = dirname( $theme_root );
        }

        $this->cache_hash = md5( $this->theme_root . '/' . $this->stylesheet );
        $theme_file       = $this->stylesheet . '/style.css';

        $cache = $this->cache_get( 'theme' );

        if ( is_array( $cache ) ) {
            foreach ( array( 'block_theme', 'errors', 'headers', 'template' ) as $key ) {
                if ( isset( $cache[ $key ] ) ) {
                    $this->$key = $cache[ $key ];
                }
            }
            if ( $this->errors ) {
                return;
            }
            if ( isset( $cache['theme_root_template'] ) ) {