isIgnored method
Implementation
bool isIgnored(String ruleName, int lineNumber) {
if (fileIgnores.contains(ruleName)) return true;
if (fileIgnores.contains('type=lint')) return true;
if (fileIgnores.contains('type=warning')) return true;
final lineRules = lineIgnores[lineNumber];
if (lineRules == null) return false;
if (lineRules.contains(ruleName)) return true;
if (lineRules.contains('type=lint')) return true;
if (lineRules.contains('type=warning')) return true;
return false;
}