add essential attribute check
add essential attribute check

e-gaulue/Karabiner,wataash/Karabiner,e-gaulue/Karabiner,tekezo/Karabiner,runarbu/Karabiner,wataash/Karabiner,tekezo/Karabiner,tekezo/Karabiner,e-gaulue/Karabiner,e-gaulue/Karabiner,runarbu/Karabiner,wataash/Karabiner,tekezo/Karabiner,wataash/Karabiner,runarbu/Karabiner,runarbu/Karabiner