call static method
Implementation
static String call(String input) {
var s = input.toLowerCase().trim();
_accents.forEach((k, v) => s = s.replaceAll(k, v));
s = s.replaceAll(RegExp(r'[^a-z0-9]+'), '-');
s = s.replaceAll(RegExp(r'^-+|-+$'), '');
return s;
}