public FirstDateChecker(FormatChecker successor) : base(successor)
{
}
public HeadChecker(FormatChecker successor) : base(successor)
{
}
protected FormatChecker(FormatChecker successor)
{
_successor = successor;
}
public LengthChecker(FormatChecker successor) : base(successor)
{
}
public SecondDateChecker(FormatChecker successor) : base(successor)
{
}