rem: return this.mRules ? this.mRules.Count() : 0; 
add: return this.mRules ? this.mRules.Count() : this.mSheetRules ? this.mSheetRules.length : 0; 
context: function() {  return this.mRules ? this.mRules.Count() : 0;});
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/732dc6261a2ac11c9af2f33803020c5eb226df56/styleRules.js/buggy/extensions/inspector/resources/content/viewers/styleRules/styleRules.js