gistfile1.txt

import java.time.*
import static java.time.DayOfWeek.*

public class BusinessOperations {

  List<DayOfWeek> weekendDays = [SUNDAY, SATURDAY]

  LocalDate lastBusinessDay( LocalDate dateInMonth ) {
    LocalDate lastDayOfMonth = dateInMonth.withDayOfMonth(dateInMonth.month.length(dateInMonth.leapYear))
    ((lastDayOfMonth)..(lastDayOfMonth - 2)).find { 
        !(it.dayOfWeek in weekendDays) 
    }
  }
}