code: final void detachShapeFromColorMap(final Shape<?> shape)
      {
          if (null != shape)
          {
              final String color = shape.getColorKey();
  
              if (null != color)
              {
                  final Shape<?> look = m_shape_color_map.get(color);
  
                  if (shape == look)
                  {
                      shape.setColorKey(null);
  
                      m_shape_color_map.remove(color);
                  }
              }
          }
      }
docs: Internal method. Detach a {@link Shape} from the Layers Color Map
  
  @param shape