text: function joinPath() {
    return Array.from(arguments).filter(Boolean).join('.');
  }
  
  function isFeature(obj) {
    return '__compat' in obj;
  }
  function isBrowser(obj) {
    return 'name' in obj && 'releases' in obj;
  }
  
  function descendantKeys(data) {
    if (isFeature(data)) {
      return Object.keys(data).filter((key) => key !== '__compat');
    }
  
    if (isBrowser(data)) {
      // Browsers never have independently meaningful descendants
      return [];
    }
  
    return Object.keys(data);
  }
  
  module.exports = {
    joinPath,
    isFeature,
    isBrowser,
    descendantKeys,
  };
  