function Test(url) {
	this.url = url;
	this.str = "want to save responseText";
}

Test.prototype.test = function () {
	alert(this.url); //可以访问到
	alert(this.str); //可以访问到
	var ajax = new Ajax.Request(
		this.url,{	
			method: "get",
			parameters: "time=" +  new Date().getTime(),
			onSuccess: function(req){
				alert(this.url); //可以访问到
				alert(this.str); //无法访问到
				//this.str = responseText; //期待的操作无法执行
			}
		}
	);
};

Event.observe(window, "load", pageLoad, false);
					
var url = "a action url";

function pageLoad(){
         var t = new Test(url);
	t.test();
}

var ClassUtils=Class.create();

ClassUtils.prototype={
        _ClassUtilsName:'ClassUtils',

        initialize:function(){
        },

        /**
         * 给类的每个方法注册一个对类对象的自我引用
         * @param reference 对类对象的引用
         */
        registerFuncSelfLink:function(reference){
                for (var n in reference) {
                var item = reference[n];                        
                if (item instanceof Function)
					item.$ = reference;
            }
        }
}

function Test(url) {
	this.url = url;
	this.str = "want to save responseText";
	new ClassUtils().registerFuncSelfLink(this);
}

Test.prototype.test = function () {
	var funcHolder=arguments.callee.$;
	alert(this.url); //可以访问到
	alert(this.str); //可以访问到
	var ajax = new Ajax.Request(
		this.url,{	
			method: "get",
			parameters: "time=" +  new Date().getTime(),
			onSuccess: function(req){
				alert(funcHolder.url); //可以访问到
				alert(funcHolder.str); //可以访问到
				funcHolder.str = responseText; //期待的操作可执行
			}
		}
	);
};

Event.observe(window, "load", pageLoad, false);
					
var url = "a action url";
vat t = new Test(url);//这次把作用域扩大一下

function pageLoad(){
	t.test();//可以了
}
function getTest(){
	alert(t.str);//可以随时察看一下，确实改变了,呵呵
}

<script language="javascript">
function registerSelf(reference){
                for (var n in reference) {
                var item = reference[n];                        
                if (item instanceof Function)
					item.$ = reference;
            }
        }

var Book = function(){
	this.name = "book";
}

Book.prototype = {
	main : function(){
		alert(9);
	}
}

var Car = function(name){
	this.name = name;
	registerSelf(this)
}
Car.prototype = {
	getName : function(){
		var book = new Book();
		book.main();
		var self = arguments.callee.$; 
		alert(self.name)
		book.main = function(){
			alert(self.name);
		}
		book.main();
	}
}

function main(){
	var car = new Car("boya");
	car.getName();
}
</script>

<a href="#" onClick="main();">do</a>

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/*
 *这个就是表达式的模型组件了，它的三个属性，分别代表了它的中则表达式和右则表达式
 *而那两个属性分别是输入的式子和得到的结果
 */
package expression;

import java.text.*;
import java.util.*;

public class ExpressionModel extends Observable
{
 
 private ArrayList<String> middle;
 private ArrayList<String> right;
 private String input, result;

 public ExpressionModel()
 {
  middle = new ArrayList<String>();
  right = new ArrayList<String>();
 }

 //判断一个字符是不是操作符
 private boolean isOperator( String op )
 {
  if( op.equals("+") || op.equals("-") || op.equals("%")
     ||op.equals("*")|| op.equals("/") || op.equals("(")
     ||op.equals(")") )
    return true;
    
  else return false;
 }

 //得到一个操作符的优先级
 private int priority( String op )
 {
  if( op.equals("+") || op.equals("-") || op.equals("(") ) 
   return 1;
  else if( op.equals("*") || op.equals("/") || op.equals("%") ) 
   return 2;
  else 
   return 0;
 }
 

//计算两个数和一个运算符得到的结果
 private String calTwoNumber( String op, String a, String b ) throws Exception
 {
  double x = Double.parseDouble( b );
  double y = Double.parseDouble( a );
  double z = 0;
  
  if( op.equals("+") ) 
   z = x + y;
  else if( op.equals("-") ) 
   z = x - y;
  else if( op.equals("*") ) 
   z = x * y;
  else if( op.equals("/") ) 
   z = x / y;
  else if( op.equals("%") ) 
   z = x % y;
  else 
   z=0;
  
  return Double.toString( z );
 }
 
//将我们输入的中则表达式转换成逆波兰式
 private void turnToRight()
 {
  MyStack stack = new MyStack();
  String op;
  int pos = 0;
  
  StringTokenizer st = new StringTokenizer(input,"+-*/%()",true);
  
  while( st.hasMoreElements() )
   middle.add( st.nextToken() );
  
  while(true)
  {
   if( isOperator( middle.get(pos) ) )
   {
    if( stack.getTop() == -1 || (middle.get(pos)).equals("(") )
    {
     stack.push( middle.get(pos) );
    }
    else
    {
     if( (middle.get(pos)).equals(")") )
     {
      if( !(stack.top()).equals("(") )
      {
       op = stack.pop();
       right.add(op);
      }
     }
     else
     {
      if( priority(middle.get(pos)) <= priority(stack.top()) && stack.getTop() != -1 )
      {
       op = stack.pop();
       if( !op.equals("(") ) 
        right.add(op);
      }
      stack.push( middle.get(pos) );
     }
    }
   }
   else 
    right.add( middle.get(pos) );
   pos++;
   if( pos >= middle.size() ) 
    break;
  }
  
  while( stack.getTop() != -1 )
  {
   op = stack.pop();
   right.add(op);
  }
 }

 private void calculate( String expression ) throws Exception
 {
  input = expression;
  
  turnToRight();
  
  MyStack stack = new MyStack();
  String op1, op2, is = null;
  Iterator<String> it = right.iterator();
  
  while(it.hasNext())
  {
   is = it.next();
   if( isOperator(is) )
   {
    op1 = stack.pop();
    op2 = stack.pop();
    stack.push( calTwoNumber(is,op1,op2) );
   }
   else stack.push(is);
  }
  
  NumberFormat form = NumberFormat.getInstance();
  form.setMaximumFractionDigits(5);
  
  result = input + "=" + form.format( Double.parseDouble( stack.pop() ) );
  
  setChanged();
  notifyObservers();
 }
 
 public void input(String expression) throws Exception
 {
  calculate(expression);
  middle.clear();
  right.clear();
 }
 
 public String getResult(){
  return result;
 }
 
}

//我们用到的自己的堆栈
package expression;

import java.util.*;

public class MyStack
{
 
 private LinkedList<String> list;
 private int top;
 
 public MyStack() 
 {
  list = new LinkedList<String>();
  top = -1;
 }
  
 public void push(String value)
 {
  top++;
  list.addFirst(value);
 }
 
 public String pop()
 {
  String temp = list.getFirst();
  top--;
  list.removeFirst();
  return temp;
 }
 
 public String top()
 {
  return list.getFirst();
 }
 
 public int getTop()
 {
  return top;
 }
 
}

//控制器组件，包括一个输入域和两个按纽

package expression;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class ExpressionController extends JPanel 
{
 
 private ExpressionModel expressionModel;   
 private JTextField calTextField;
 
 public ExpressionController( ExpressionModel controllerModel ) {
  
  super();
  
  expressionModel = controllerModel;
  
  calTextField = new JTextField( 15 );
  JButton calButton = new JButton( "计算" );
  JButton delButton = new JButton( "取消" );
  
  calButton.addActionListener(
   new ActionListener() 
   {
    public void actionPerformed( ActionEvent event ) 
    {
     try 
     {
      expressionModel.input( calTextField.getText() );
      calTextField.setText("");
     }
     catch ( Exception exception ) 
     {
      JOptionPane.showMessageDialog ( 
       ExpressionController.this, 
       "请输入有效表达式！", "错误", 
       JOptionPane.ERROR_MESSAGE );
      calTextField.setText("");
     }
    }
   }
  );
  
  delButton.addActionListener(
   new ActionListener() 
   {
    public void actionPerformed( ActionEvent event ) 
    {
     try 
     {
      calTextField.setText("");
     }
     catch ( Exception exception ) 
     {
      calTextField.setText("");
     }
    }
   }
  );
  
  setLayout( new FlowLayout() );
  
  add( calTextField );
  add( calButton );
  add( delButton );
 
 }
 
 public Dimension getPreferredSize() 
 {
  return new Dimension( 320, 40 );
 }
 
 public Dimension getMinimumSize() 
 {
  return getPreferredSize();
 }
 
 public Dimension getMaximumSize() 
 {
  return getPreferredSize();
 }
 
}

//用来显示结果的视图
package expression;

import java.awt.*;
import java.text.*;
import java.util.*;

import javax.swing.*;
import javax.swing.border.*;

public class ExpressionView extends JPanel implements Observer 
{
 
 private ExpressionModel expressionModel;
 private JLabel display = new JLabel();
 
 public ExpressionView( ExpressionModel model ) {
  
  if( model == null ) 
   throw new NullPointerException();
  
  expressionModel = model;
  expressionModel.addObserver( this );
  
  add( display );
  
  setBackground( Color.white );
  setBorder( new MatteBorder( 1, 1, 1, 1, Color.black ) );
  
 }
 
 public void update( Observable observable, Object object ) 
 {
  display.setText( expressionModel.getResult() );
 }
 
 public Dimension getPreferredSize() 
 {
  return new Dimension( 320, 60 );
 }
 
 public Dimension getMinimumSize() 
 {
  return getPreferredSize();
 }
 
 public Dimension getMaximumSize() 
 {
  return getPreferredSize();
 }
 
 
}

package expression;

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;
import javax.swing.border.*;

public class Expression extends JApplet 
{
   
 public void init() 
 {
  ExpressionModel model = new ExpressionModel();
  ExpressionView view = new ExpressionView( model );
  ExpressionController controller = new ExpressionController( model );
  
  Container contentPane = getContentPane();
  contentPane.add( view, BorderLayout.CENTER );
  contentPane.add( controller, BorderLayout.SOUTH );
  
  setSize( 320, 100 );
  
 }
   
}

<object
    classid = "clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
    codebase = "http://java.sun.com/update/1.5.0/jinstall-1_5-windows-i586.cab#Version=5,0,0,5"
    WIDTH = 320 HEIGHT = 100 >
    <PARAM NAME = CODE VALUE = "expression.Expression" >
    <PARAM NAME = ARCHIVE VALUE = "expression.jar" >
    <param name = "type" value = "application/x-java-applet;version=1.5">
    <param name = "scriptable" value = "false">
</object>

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package subject.model;

public abstract class User extends BaseObject
{
 private Integer id;
 private String user;
 private String password;
 private String name;
 private String telphone;

  //set and get method 
 //这个是用来反映用户角色的关键函数,在子类实现,从而实现多态
 public abstract String getType(); 
}

package subject.model;

import subject.Constants;

public class Teacher extends User
{
 private String level;         //教师的职称

//set and get method

 public String getType()
 {
  return Constants.TEACHER;
 }
}

package subject.model;

import subject.Constants;

public class Student extends User
{
 private static final long serialVersionUID = 1L;

 private SchoolClass schoolClass;         //学生的班级
 private String sn;             //学生的学号

//set and get method
 
 public String getType()
 {
  return Constants.STUDENT;
 }
}

package subject.model;

import subject.Constants;

public class Admin extends User
{
 private String grade;           //管理员的级别
//set and get method

 public String getType()
 {
  return Constants.ADMIN;
 }
}

<hibernate-mapping>

 <class name="subject.model.User" discriminator-value="not null">

  <id name="id">
   <generator class="increment" />
  </id>
  
  <discriminator column="type" type="character" />
  
  <property name="user" />
  <property name="password" />
  <property name="name" />
  <property name="telphone" />

  <subclass name="subject.model.Admin" discriminator-value="a">
   <property name="grade" column="sn" />
  </subclass>
  
  <subclass name="subject.model.Teacher" discriminator-value="t">
   <property name="level" column="sn" />
  </subclass>
  
  <subclass name="subject.model.Student" discriminator-value="s">
   
   <property name="sn" />
   
   <many-to-one name="schoolClass" class="subject.model.SchoolClass" 
    column="about" update="false" insert="false" />
    
  </subclass>

 </class>

</hibernate-mapping>

<!-- 定义DBCP数据源 -->
 <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
  <property name="driverClassName" value="com.mysql.jdbc.Driver" />
  <property name="url" value="jdbc:mysql://localhost/subject?useUnicode=true&characterEncoding=gbk" />
  <property name="username" value="root" />
  <property name="password" value="" />
  <property name="maxActive" value="100" />
  <property name="maxIdle" value="30" />
  <property name="maxWait" value="1000" />
  <property name="defaultAutoCommit" value="true" />
  <property name="removeAbandoned" value="true" />
  <property name="removeAbandonedTimeout" value="60" />
 </bean>

 <!-- Hibernate -->
 <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
  <property name="dataSource" ref="dataSource" />
  <property name="mappingResources">
   <list>
    <value>subject/model/User.hbm.xml</value>
   </list>
  </property>
  <property name="hibernateProperties">
   <props>
    <prop key="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</prop>
   </props>
  </property>
 </bean>

 <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
  <property name="sessionFactory" ref="sessionFactory" />
 </bean>

<!-- Dao对象 -->
<bean id="userDao" class="subject.dao.hibernate.UserDaoImpl">
  <property name="sessionFactory" ref="sessionFactory" />
 </bean>

<!-- 业务逻辑 -->
 <bean id="txProxyTemplate" abstract="true" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
  <property name="transactionManager" ref="transactionManager" />
  <property name="transactionAttributes">
   <props>
    <prop key="save*">PROPAGATION_REQUIRED</prop>
    <prop key="remove*">PROPAGATION_REQUIRED</prop>
    <prop key="get*">PROPAGATION_REQUIRED,readOnly</prop>
   </props>
  </property>
 </bean>

<bean id="userManager" parent="txProxyTemplate">
  <property name="target">
   <bean class="subject.service.impl.UserManagerImpl">
    <property name="userDao" ref="userDao" />
   </bean>
  </property>
 </bean>

<!-- Struts -->
 <bean name="/user" class="subject.web.action.UserAction" singleton="false">
  <property name="userManager">
   <ref bean="userManager" />
  </property>
 </bean>

<!-- Acegi安全控制 Filter 配置 -->
    <filter>
        <filter-name>securityFilter</filter-name>
        <filter-class>org.acegisecurity.util.FilterToBeanProxy</filter-class>
        <init-param>
            <param-name>targetClass</param-name>
            <param-value>org.acegisecurity.util.FilterChainProxy</param-value>
        </init-param>
    </filter>
    
    <filter-mapping>
        <filter-name>securityFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

<!-- ======================== FILTER CHAIN ======================= -->
 <bean id="filterChainProxy" class="org.acegisecurity.util.FilterChainProxy">
  <property name="filterInvocationDefinitionSource">
   <value>
    CONVERT_URL_TO_LOWERCASE_BEFORE_COMPARISON 
    PATTERN_TYPE_APACHE_ANT
    
    /**=httpSessionContextIntegrationFilter,logoutFilter,authenticationProcessingFilter,
         securityContextHolderAwareRequestFilter,exceptionTranslationFilter,filterInvocationInterceptor
   </value>
  </property>
 </bean>

<!-- ======================== FILTER ======================= -->
 <bean id="httpSessionContextIntegrationFilter" 
  class="org.acegisecurity.context.HttpSessionContextIntegrationFilter" />

 <bean id="logoutFilter" class="org.acegisecurity.ui.logout.LogoutFilter">
  <constructor-arg value="/index.htm" />             离开后所转向的位置
  <constructor-arg>
            <list>
                <bean class="org.acegisecurity.ui.logout.SecurityContextLogoutHandler"/>
            </list>
        </constructor-arg>
  <property name="filterProcessesUrl" value="/logout.htm" />        定义用户注销的地址，
 </bean>

 <bean id="authenticationProcessingFilter" class="subject.web.filter.UserAuthenticationProcessingFilter">
  <property name="authenticationManager" ref="authenticationManager"/>  下面会介绍的用来起到认证管理的作用
  <property name="authenticationFailureUrl" value="/login.htm?error=wrong"/>  登陆失败的地址
  <property name="defaultTargetUrl" value="/login.htm"/>       登陆成功的地址
  <property name="filterProcessesUrl" value="/j_security_check"/>      登陆请求的地址
  <property name="userManager" ref="userManager"/>        自己添加的属性，这样就可以访问到我们的业务逻辑
  <property name="exceptionMappings">   出现异常所对应的地址
            <value>
                org.acegisecurity.AuthenticationException=/login.htm?error=fail     登陆失败                org.acegisecurity.concurrent.ConcurrentLoginException=/login.htm?error=too        已登陆了
            </value>
        </property>
 </bean>
 
 <bean id="securityContextHolderAwareRequestFilter" class="org.acegisecurity.wrapper.SecurityContextHolderAwareRequestFilter"/>

 <bean id="exceptionTranslationFilter" class="org.acegisecurity.ui.ExceptionTranslationFilter">
  <property name="authenticationEntryPoint">
   <bean class="org.acegisecurity.ui.webapp.AuthenticationProcessingFilterEntryPoint">
    <property name="loginFormUrl" value="/login.htm?error=please"/>//如果用户没登陆就想访问，先到这里登陆吧
    <property name="forceHttps" value="false"/>
   </bean>
  </property>
 </bean>
 
 <bean id="filterInvocationInterceptor" class="org.acegisecurity.intercept.web.FilterSecurityInterceptor">
  <property name="authenticationManager" ref="authenticationManager"/>       认证服务
  <property name="accessDecisionManager">
   <bean class="org.acegisecurity.vote.AffirmativeBased">
    <property name="allowIfAllAbstainDecisions" value="false"/>
    <property name="decisionVoters">
     <list>
      <bean class="org.acegisecurity.vote.RoleVoter">
                    <property name="rolePrefix" value=""/>         //这里定义数据库中存放的角色和我们在这里声明的角色间是否需要加个前缀？我没加
                </bean>
     </list>
    </property>
   </bean>
  </property>
  <property name="objectDefinitionSource">
            <value>
                PATTERN_TYPE_APACHE_ANT
                
                /admin.htm*=a         这里就是数据库中对应的tyep a
                /student*=s           由于没有前缀和数据库里一样
                /teacher*=t
            </value>
        </property>
 </bean>
 
 <bean id="loggerListener"
          class="org.acegisecurity.event.authentication.LoggerListener"/>       记录事件

下面就要说明我们的认证服务了，其起到的关键作用就是用来保证用户登陆身份的验证：

它将验证的功能委托给多个Provider，并通过遍历Providers, 以保证获取不同来源的身份认证，若某个Provider能成功确认当前用户的身份，authenticate()方法会返回一个完整的包含用户授权信息的Authentication对象，否则会抛出一个AuthenticationException。

先声明一个管理器吧，在上面的过滤器中都已经用到过了
<!-- ======================== AUTHENTICATION ======================= -->
 <bean id="authenticationManager" class="org.acegisecurity.providers.ProviderManager">
  <property name="providers">
   <list>
    <ref local="daoAuthenticationProvider" />   我仅仅用到 从数据库中读取用户信息验证身份
   </list>
  </property>
  <property name="sessionController">
   <bean id="concurrentSessionController" 
    class="org.acegisecurity.concurrent.ConcurrentSessionControllerImpl">
    <property name="maximumSessions">
     <value>1</value>每个用户同时登陆一位
    </property>
    <property name="sessionRegistry">
     <bean id="sessionRegistry" class="org.acegisecurity.concurrent.SessionRegistryImpl" />
    </property>
    <property name="exceptionIfMaximumExceeded" value="true" />
   </bean>
  </property>
 </bean>
 来实现唯一的一个Provider，从数据库验证身份
 <bean id="daoAuthenticationProvider" class="org.acegisecurity.providers.dao.DaoAuthenticationProvider">
  <property name="userDetailsService">
   <bean id="jdbcDaoImpl"
            class="org.acegisecurity.userdetails.jdbc.JdbcDaoImpl">
          <property name="dataSource" ref="dataSource"/>
          <property name="usersByUsernameQuery">
              <value>
                  select user,password,about from user where user = ?        查找用户的查询语句，只需要把你数据库中的用户和密码以及enable相对应上就行
              </value>
          </property>
          <property name="authoritiesByUsernameQuery">
              <value>
                  select user,type from user where user = ?           这里就是把用户和权限对应上，在appfuse中用的两个表，我都放一个表里了，所以就用这一个就行问题的关键是要让它能找到两个字段，构成一个对象
              </value>
          </property>
      </bean>
  </property>
  <property name="userCache"> 缓存都这么写：
   <bean class="org.acegisecurity.providers.dao.cache.EhCacheBasedUserCache">
    <property name="cache">
     <bean class="org.springframework.cache.ehcache.EhCacheFactoryBean">
      <property name="cacheManager">
       <bean class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"/>
      </property>
      <property name="cacheName" value="userCache"/>
     </bean>
    </property>
   </bean>
  </property>
 </bean>

package subject.web.filter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.acegisecurity.Authentication;
import org.acegisecurity.context.SecurityContext;
import org.acegisecurity.context.SecurityContextHolder;
import org.acegisecurity.ui.webapp.AuthenticationProcessingFilter;
import org.acegisecurity.userdetails.UserDetails;

import subject.Constants;
import subject.model.User;
import subject.service.UserManager;

public class UserAuthenticationProcessingFilter extends
  AuthenticationProcessingFilter
{
 private UserManager userManager;

 public void setUserManager( UserManager userManager )
 {
  this.userManager = userManager;
 }

 protected boolean requiresAuthentication( HttpServletRequest request ,
   HttpServletResponse response )
 {
  boolean requiresAuth = super.requiresAuthentication( request, response );
  HttpSession httpSession = null;
  try
  {
   httpSession = request.getSession( false );
  }
  catch ( IllegalStateException ignored )
  {
  }
  if ( httpSession != null )
  {
   if ( httpSession.getAttribute( Constants.USER ) == null )
   {
    if ( !requiresAuth )
    {
     SecurityContext sc = SecurityContextHolder.getContext();
     Authentication auth = sc.getAuthentication();
     if ( auth != null
       && auth.getPrincipal() instanceof UserDetails )
     {
      UserDetails ud = (UserDetails) auth.getPrincipal();//上面声明的sql无非就是要包装成这个对象
      User user = userManager.getUser( ud.getUsername() );从业务逻辑里找到用户，放到session里
      httpSession.setAttribute( Constants.USER, user );
     }
    }
   }
  }
  return requiresAuth;
 }
}

public class UserAction extends BaseAction
{
 private UserManager mgr;

 public void setUserManager( UserManager mgr )
 {
  this.mgr = mgr;
 }

 public ActionForward login( ActionMapping mapping , ActionForm form ,
   HttpServletRequest request , HttpServletResponse response )
   throws Exception
 {
  User user = (User) getSessionObject( request, Constants.USER );
  ActionMessages msg = new ActionMessages();
  if ( user != null )
  {
   return new ActionForward(  user.getType() + ".htm", true );成功就去type.htm
  }
  else
  {
   String error = getParameter( request, Constants.ERROR );
   if ( error != null )对于不同的错误，都加以提示
   {
    if ( error.equalsIgnoreCase( "wrong" ) )
     msg.add( "msg", new ActionMessage( "fail.login.wrong" ) );
    else if ( error.equalsIgnoreCase( "too" ) )
     msg.add( "msg", new ActionMessage( "fail.login.too" ) );
    else if ( error.equalsIgnoreCase( "fail" ) )
     msg.add( "msg", new ActionMessage( "fail.login.fail" ) );
    else
     msg.add( "msg", new ActionMessage( "fail.login.please" ) );
   }
   else
    msg.add( "msg", new ActionMessage( "fail.login.please" ) );
  }
  saveErrors( request, msg );
  return mapping.findForward( "fail" );
 }

}

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