FactoryBean by ampersand (&) in spring

FactoryBean factoryBean=(FactoryBean)context.getBean("&customfb");
 

package com.concretepage;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.concretepage.test.MyBean;
public class SpringAppDemo {
	public static void main(String[] args) throws Exception {
		AbstractApplicationContext  context = new ClassPathXmlApplicationContext("app-test.xml");
	    FactoryBean factoryBean=(FactoryBean)context.getBean("&customfb");
	    MyBean myBean = (MyBean)factoryBean.getObject();
	    myBean.doTask();
		
	}
}  

package com.concretepage.test;
import org.springframework.beans.factory.FactoryBean;
import com.concretepage.test.MyBean;
public class CustomFactoryBean implements FactoryBean {
	private MyBean myBean=new MyBean();
	@Override
	public MyBean getObject() throws Exception {
		return myBean;
	}
	@Override
	public Class<? extends MyBean> getObjectType() {
		return myBean.getClass();
	}
	@Override
	public boolean isSingleton() {
		return false;
	}
} 

<beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
  xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd ">
 
    <bean id="customfb" class="com.concretepage.test.CustomFactoryBean"  />
      
</beans> 

Object of MyBean is created.
do some task.