public void clear(){
  Set<Sensor> oldSelection=new HashSet<Sensor>(selection);
  selection.clear();
  if (!oldSelection.isEmpty()) {
    fireSelectionChanged(oldSelection,selection);
  }
}

public void clear ( ) { Set < Sensor > oldSelection = new HashSet < Sensor > ( selection ) ; selection . clear ( ) ; if ( ! oldSelection . isEmpty ( ) ) { fireSelectionChanged ( oldSelection , selection ) ; } }
clear this sensor selection model .
