code: public void configure(AbstractButton button, AbstractCommand command, CommandFaceDescriptor faceDescriptor) {
          Assert.notNull(button, "The button to configure cannot be null.");
          Assert.notNull(faceDescriptor, "The command face descriptor cannot be null.");
          faceDescriptor.configureLabel(button);
          faceDescriptor.configureIcon(button);
          faceDescriptor.configureColor(button);
          button.setToolTipText(faceDescriptor.getCaption());
      }
docs: {@inheritDoc}