public SyncPropertyValidator <TProp> Setup <TProp>(Expression <Func <TObject, TProp> > expression)
{
var memberInfo = PropertyExtractor.Extract(expression);
if (PropertyValidators.TryGetValue(memberInfo.Name, out var propertyValidator))
{
return((SyncPropertyValidator <TProp>)propertyValidator);
}
var newPropertyValidator = new SyncPropertyValidator <TProp>(memberInfo);
PropertyValidators.Add(memberInfo.Name, newPropertyValidator);
return(newPropertyValidator);
}