public void remove(ressourceStack stack)
{
newContent[stack.getRessource()] -= stack.getAmount();
}
public void add(ressourceStack stack)
{
this.newContent[stack.getRessource()] += stack.getAmount();
}
//checks if there's enough ressources to be taken
public bool canTake(ressourceStack stack)
{
return(newContent[stack.getRessource()] >= stack.getAmount());
}