required method
Implementation
ValidatorString required({String errMsg = 'Field is required'}) {
validate((v) => v == null || v.toString().isNullOrEmpty ? errMsg : null);
return this;
}
ValidatorString required({String errMsg = 'Field is required'}) {
validate((v) => v == null || v.toString().isNullOrEmpty ? errMsg : null);
return this;
}