@Override
  public void setFillColor(final Color color) {
    if (super.getFillColor() != color) {
      super.setFillColor(color);
      updateContentSelectionColor();
    }
  }
Removes a listener object from the realizer.

@param listener The listener object to be removed.
java/zylib/src/main/java/com/google/security/zynamics/zylib/yfileswrap/gui/zygraph/realizers/ZyNodeRealizer.java