check method

@override bool check(String? value)

checks the input against the given conditions

Implementation

@override
bool check(String? value) {
  if (value == null) {
    return false;
  }
  if(countWhiteSpaces){
    return value.length == exact;
  }else{
    return value.replaceAll(RegExp('\\s+'), '').length == exact;
  }
}