code: public int getLabel(GraphObject go)
  	{
  		if (!dist.containsKey(go))
  		{
  			// Absence of label is interpreted as infinite
  			return Integer.MAX_VALUE-(limit*2);
  		}
  		else
  		{
  			return dist.get(go);
  		}
  	}
docs: Gets the distance label of the object.
  @param go object to get the distance
  @return the distance label