package UserInterface public with SEI; device UserInput features ui_cc: feature group ui_cc_type; properties SEI::NetWeight => 0.7 kg; end UserInput; device UserDisplay features ud_cc: feature group ud_cc_type; properties SEI::NetWeight => 1.0 kg; end UserDisplay; feature group ui_cc_type end ui_cc_type; feature group ud_cc_type end ud_cc_type; end UserInterface;