old_contents: module.exports = {
    whitelist: [
      'rtl',
      'home',
      'blog',
      'archive',
      'date',
      'error404',
      'logged-in',
      'admin-bar',
      'no-customize-support',
      'custom-background',
      'wp-custom-logo',
      'alignnone',
      'alignright',
      'alignleft',
      'wp-caption',
      'wp-caption-text',
      'screen-reader-text',
      'comment-list',
    ],
    whitelistPatterns: [
      /^search(-.*)?$/,
      /^(.*)-template(-.*)?$/,
      /^(.*)?-?single(-.*)?$/,
      /^postid-(.*)?$/,
      /^attachmentid-(.*)?$/,
      /^attachment(-.*)?$/,
      /^page(-.*)?$/,
      /^(post-type-)?archive(-.*)?$/,
      /^author(-.*)?$/,
      /^category(-.*)?$/,
      /^tag(-.*)?$/,
      /^tax-(.*)?$/,
      /^term-(.*)?$/,
      /^(.*)?-?paged(-.*)?$/,
    ],
  };
  
new_contents: module.exports = {
    whitelist: [
      'rtl',
      'home',
      'blog',
      'archive',
      'date',
      'error404',
      'logged-in',
      'admin-bar',
      'no-customize-support',
      'custom-background',
      'wp-custom-logo',
      'alignnone',
      'alignright',
      'alignleft',
      'wp-caption',
      'wp-caption-text',
      'screen-reader-text',
      'comment-list',
      'wp-social-link',
    ],
    whitelistPatterns: [
      /^search(-.*)?$/,
      /^(.*)-template(-.*)?$/,
      /^(.*)?-?single(-.*)?$/,
      /^postid-(.*)?$/,
      /^attachmentid-(.*)?$/,
      /^attachment(-.*)?$/,
      /^page(-.*)?$/,
      /^(post-type-)?archive(-.*)?$/,
      /^author(-.*)?$/,
      /^category(-.*)?$/,
      /^tag(-.*)?$/,
      /^tax-(.*)?$/,
      /^term-(.*)?$/,
      /^(.*)?-?paged(-.*)?$/,
      /^wp-block-(.*)?$/,
      /^has-(.*)?$/,
      /^is-(.*)?$/,
      /^wp-embed-(.*)?$/,
      /^blocks-gallery-(.*)?$/,
    ],
  };
  
subject: Add Gutenberg classes to index.js