null object pattern

object with no referenced value or with defined neutral ("null") behavior

en-US/ˈnʌl ɑbˈd͡ʒɪktv ˈpædɚn/
en-GB/ˈnʌl ˈɒbd͡ʒɪkt ˈpætən/

ক্যাটাগরি:

behavioral pattern