code: public void attach(AbstractButton button, String faceDescriptorId, CommandButtonConfigurer configurer) {
  		getButtonManager(faceDescriptorId).attachAndConfigure(button, configurer);
  		onButtonAttached(button);
  	}
docs: Attach and configure the button to the faceDescriptorId using the configurer.
  
  @param button the button to attach and configure.
  @param faceDescriptorId the id of the faceDescriptor.
  @param configurer that maps the faceDescriptor on the button.