code: @Override
  	public void clear() {
  		Color neg = mapping.get(Double.NEGATIVE_INFINITY);
  		Color pos = mapping.get(Double.POSITIVE_INFINITY);
  		mapping.clear();
  		mapping.put(Double.NEGATIVE_INFINITY, neg);
  		mapping.put(Double.POSITIVE_INFINITY, pos);
  	}
docs: Clears all finite endpoints
  
  @see java.util.Map#clear()