public void addPlottable(Plottable plottable){
  mAlias=plottable.getAlias();
  mID=plottable.getID();
  mPlottables.add(plottable);
  while (mPlottables.size() > mMaxHistory) {
    mPlottables.remove(mPlottables.first());
  }
}

public void addPlottable ( Plottable plottable ) { mAlias = plottable . getAlias ( ) ; mID = plottable . getID ( ) ; mPlottables . add ( plottable ) ; while ( mPlottables . size ( ) > mMaxHistory ) { mPlottables . remove ( mPlottables . first ( ) ) ; } }
adds the plottable to this entity
