CSSRule constructor
      
      CSSRule({ 
    
    
- StyleSheetId? styleSheetId,
- required SelectorList selectorList,
- List<String> ? nestingSelectors,
- required StyleSheetOrigin origin,
- required CSSStyle style,
- List<CSSMedia> ? media,
- List<CSSContainerQuery> ? containerQueries,
- List<CSSSupports> ? supports,
- List<CSSLayer> ? layers,
- List<CSSScope> ? scopes,
- List<CSSRuleType> ? ruleTypes,
- List<CSSStartingStyle> ? startingStyles,
Implementation
CSSRule({
  this.styleSheetId,
  required this.selectorList,
  this.nestingSelectors,
  required this.origin,
  required this.style,
  this.media,
  this.containerQueries,
  this.supports,
  this.layers,
  this.scopes,
  this.ruleTypes,
  this.startingStyles,
});