code: public <E> E getServiceInterface(Class<E> serviceInterface, SPF spf) {
  		if (spf == null || serviceInterface == null) {
  			throw new NullPointerException();
  		}
  
  		return spf
  				.<SPFServiceExecutor> getComponent(SPF.SERVICE_EXECUTION)
  				.createStub(this, serviceInterface, getClass().getClassLoader());
  	}
docs: Shorthand method to create an invocation interface for {@code this} person.
  
  @param serviceInterface
  @param spf
  @return