merge method

HolidayCalendar merge(
  1. HolidayCalendar other
)

Creates a new calendar by merging with another.

Implementation

HolidayCalendar merge(HolidayCalendar other) => HolidayCalendar(
      fixedHolidays: [...fixedHolidays, ...other.fixedHolidays],
      annualHolidays: [...annualHolidays, ...other.annualHolidays],
      name: '$name + ${other.name}',
    );