Write the definition of a method for the DateType class called countDays that takes a DateType object as its parameter. Create an ArrayList of type DateType. The method should count how many day are between the current object's date $($the current DateType object$)$ and the parameter $($DateType object$)$ and return the integer value to the calling function. The method works by subtracting the current date object $($DateType object$)$ from the date member of the DateType object parameter. $($Note: do not use system date methods for this method.$)$