code: public boolean add(Byte value) {
  		if (value == null) {
  			stateList.add(Type.NULL);
  		} else {
  			stateList.add(Type.LONG);
  		}
  
  		return super.add(value);
  	}
docs: see {@link List#add(Object)}.
  this method is alternative of {@link #add(Object, Type)} call with {@link Type#LONG}.
  @param value
  @return see {@link List#add(Object)}
  @since 1.4.12
  @author vvakame