parseCssRuleTextProperties function
Returns a list of properties of the CssRule text.
Implementation
String parseCssRuleTextProperties(String? cssRuleText) {
if (cssRuleText == null || cssRuleText.isEmpty) return '';
var idx1 = cssRuleText.indexOf('{');
if (idx1 < 0) return '';
var idx2 = cssRuleText.lastIndexOf('}');
var properties = cssRuleText.substring(idx1 + 1, idx2).trim();
return properties;
}