public ValidatorNode(RuleBuilder <TInstance> builder, Func <TInstance, TValue> valueFunction, string propertyKey, string propertyName, IValidator <TInstance, TValue> validator)
{
this.builder = builder;
this.valueFunction = valueFunction;
this.propertyKey = propertyKey;
this.propertyName = propertyName;
Validator = validator;
Rule = new ValidatorRule <TInstance, TValue>(propertyKey, propertyName, validator, valueFunction);
builder.AddRule(Rule);
}