<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Lombok on</title><link>https://taetaetae.github.io/tags/lombok/</link><description>Recent content in Lombok on</description><generator>Hugo</generator><language>en</language><lastBuildDate>Wed, 22 Feb 2017 17:48:42 +0000</lastBuildDate><atom:link href="https://taetaetae.github.io/tags/lombok/index.xml" rel="self" type="application/rss+xml"/><item><title>lombok(롬복)소개 및 설치</title><link>https://taetaetae.github.io/2017/02/22/lombok/</link><pubDate>Wed, 22 Feb 2017 17:48:42 +0000</pubDate><guid>https://taetaetae.github.io/2017/02/22/lombok/</guid><description>&lt;p>일반적으로 자바개발을 하다보면 &lt;code>Model&lt;/code> 을 만들고 각 멤버변수를 접근할수 있는 (각 요소들이 private 접근권한을 가지고 있을때) method 를 만들게 된다. IDE에서 제공하는 아래처럼&amp;hellip; (윈도우/이클립스 기준)&lt;!-- more -->&lt;/p>
&lt;ul>
&lt;li>get/set 메소드 : &lt;code>Alt&lt;/code> + &lt;code>Shift&lt;/code> + &lt;code>S&lt;/code> + &lt;code>R&lt;/code>&lt;/li>
&lt;li>toString 메소드 : &lt;code>Alt&lt;/code> + &lt;code>Shift&lt;/code> + &lt;code>S&lt;/code> + &lt;code>S&lt;/code>&lt;/li>
&lt;li>기타 등등&amp;hellip;&lt;/li>
&lt;/ul>
&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-java" data-lang="java">&lt;span class="line">&lt;span class="cl">&lt;span class="kd">public&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="kd">class&lt;/span> &lt;span class="nc">Student&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="p">{&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="kd">private&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="kt">int&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">id&lt;/span>&lt;span class="p">;&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="kd">private&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">String&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">name&lt;/span>&lt;span class="p">;&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="kd">private&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="kt">int&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">grade&lt;/span>&lt;span class="p">;&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="kd">private&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">String&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">department&lt;/span>&lt;span class="p">;&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="kd">public&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="kt">int&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="nf">getId&lt;/span>&lt;span class="p">()&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="p">{&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="k">return&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">id&lt;/span>&lt;span class="p">;&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="p">}&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="kd">public&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="kt">void&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="nf">setId&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="kt">int&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">id&lt;/span>&lt;span class="p">)&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="p">{&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="k">this&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="na">id&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">id&lt;/span>&lt;span class="p">;&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="p">}&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="kd">public&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">String&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="nf">getName&lt;/span>&lt;span class="p">()&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="p">{&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="k">return&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">name&lt;/span>&lt;span class="p">;&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="p">}&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="kd">public&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="kt">void&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="nf">setName&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="n">String&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">name&lt;/span>&lt;span class="p">)&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="p">{&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="k">this&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="na">name&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">name&lt;/span>&lt;span class="p">;&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="p">}&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="kd">public&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="kt">int&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="nf">getGrade&lt;/span>&lt;span class="p">()&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="p">{&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="k">return&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">grade&lt;/span>&lt;span class="p">;&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="p">}&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="kd">public&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="kt">void&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="nf">setGrade&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="kt">int&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">grade&lt;/span>&lt;span class="p">)&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="p">{&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="k">this&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="na">grade&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">grade&lt;/span>&lt;span class="p">;&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="p">}&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="kd">public&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">String&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="nf">getDepartment&lt;/span>&lt;span class="p">()&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="p">{&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="k">return&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">department&lt;/span>&lt;span class="p">;&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="p">}&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="kd">public&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="kt">void&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="nf">setDepartment&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="n">String&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">department&lt;/span>&lt;span class="p">)&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="p">{&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="k">this&lt;/span>&lt;span class="p">.&lt;/span>&lt;span class="na">department&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">department&lt;/span>&lt;span class="p">;&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="p">}&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="nd">@Override&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="kd">public&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">String&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="nf">toString&lt;/span>&lt;span class="p">()&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="p">{&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="k">return&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="s">&amp;#34;Student [id=&amp;#34;&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="o">+&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">id&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="o">+&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="s">&amp;#34;, name=&amp;#34;&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="o">+&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">name&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="o">+&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="s">&amp;#34;, grade=&amp;#34;&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="o">+&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">grade&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="o">+&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="s">&amp;#34;, department=&amp;#34;&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="o">+&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">department&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="o">+&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="s">&amp;#34;]&amp;#34;&lt;/span>&lt;span class="p">;&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="p">}&lt;/span>&lt;span class="w"> 
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w">&lt;/span>&lt;span class="p">}&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>이렇게 하는 방법도 있지만 어노테이션 설정으로 적용할수 있는 간단한 라이브러리를 소개하고자 한다.
바로 &lt;code>lombok&lt;/code>, 공식 홈페이지 : &lt;a href="https://projectlombok.org" target="_blank" rel="noopener noreffer ">https://projectlombok.org&lt;/a>
설치 및 사용방법은 아주 간단하다. 공식 홈페이지에서 jar를 다운받고 실행, 아래처럼 이클립스 실행파일 경로를 설정해준다음에 인스톨을 누르면 된다.
&lt;img
 class="lazyload"
 src="https://taetaetae.github.io/svg/loading.min.svg"
 data-src="https://taetaetae.github.io/images/lombok/lombok.png"
 data-srcset="https://taetaetae.github.io/images/lombok/lombok.png, https://taetaetae.github.io/images/lombok/lombok.png 1.5x, https://taetaetae.github.io/images/lombok/lombok.png 2x"
 data-sizes="auto"
 alt="/images/lombok/lombok.png"
 title="/images/lombok/lombok.png" />
maven 환경에서 dependency를 가져오기 위해서는 당연히 추가설정을 해줘야 한다.&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-xml" data-lang="xml">&lt;span class="line">&lt;span class="cl">&lt;span class="nt">&amp;lt;dependency&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nt">&amp;lt;groupId&amp;gt;&lt;/span>org.projectlombok&lt;span class="nt">&amp;lt;/groupId&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nt">&amp;lt;artifactId&amp;gt;&lt;/span>lombok&lt;span class="nt">&amp;lt;/artifactId&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl"> &lt;span class="nt">&amp;lt;version&amp;gt;&lt;/span>1.16.10&lt;span class="nt">&amp;lt;/version&amp;gt;&lt;/span> &lt;span class="c">&amp;lt;!--버전은 그때 맞춰서--&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nt">&amp;lt;/dependency&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>실제로 코드상에서 사용방법은 다음과 같다. 정말 간단히, 어노테이션만 적용해주면 끝!&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-java" data-lang="java">&lt;span class="line">&lt;span class="cl">&lt;span class="kn">import&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="nn">lombok.Data&lt;/span>&lt;span class="p">;&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w">&lt;/span>&lt;span class="nd">@Data&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w">&lt;/span>&lt;span class="kd">public&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="kd">class&lt;/span> &lt;span class="nc">Student&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="p">{&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="kd">private&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="kt">int&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">id&lt;/span>&lt;span class="p">;&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="kd">private&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">String&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">name&lt;/span>&lt;span class="p">;&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="kd">private&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="kt">int&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">grade&lt;/span>&lt;span class="p">;&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w"> &lt;/span>&lt;span class="kd">private&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">String&lt;/span>&lt;span class="w"> &lt;/span>&lt;span class="n">department&lt;/span>&lt;span class="p">;&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="w">&lt;/span>&lt;span class="p">}&lt;/span>&lt;span class="w">
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>그럼 이렇게 기본적인 method들이 생성된다.
&lt;img
 class="lazyload"
 src="https://taetaetae.github.io/svg/loading.min.svg"
 data-src="https://taetaetae.github.io/images/lombok/lombok-annotation.png"
 data-srcset="https://taetaetae.github.io/images/lombok/lombok-annotation.png, https://taetaetae.github.io/images/lombok/lombok-annotation.png 1.5x, https://taetaetae.github.io/images/lombok/lombok-annotation.png 2x"
 data-sizes="auto"
 alt="/images/lombok/lombok-annotation.png"
 title="/images/lombok/lombok-annotation.png" />
일반적으로 &lt;code>@Data&lt;/code>를 사용하고 상황에 따라 필요한 어노테이션만 지정도 가능하다고 한다.&lt;/p>
&lt;ul>
&lt;li>@Getter and @Setter&lt;/li>
&lt;li>@NonNull&lt;/li>
&lt;li>@ToString&lt;/li>
&lt;li>@EqualsAndHashCode&lt;/li>
&lt;li>@Data&lt;/li>
&lt;li>@Cleanup&lt;/li>
&lt;li>@Synchronized&lt;/li>
&lt;li>@SneakyThrows
참고 URL : &lt;a href="http://jnb.ociweb.com/jnb/jnbJan2010.html" target="_blank" rel="noopener noreffer ">http://jnb.ociweb.com/jnb/jnbJan2010.html&lt;/a>&lt;/li>
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