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FieldBasedLogFormatter Class Reference
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<section>
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<section class="section">
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<h1>FieldBasedLogFormatter</h1>
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<div class="declaration">
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<div class="language">
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<pre class="highlight"><code><span class="n">open</span> <span class="kd">class</span> <span class="kt">FieldBasedLogFormatter</span><span class="p">:</span> <span class="kt"><a href="../Classes/ConcatenatingLogFormatter.html">ConcatenatingLogFormatter</a></span></code></pre>
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</div>
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</div>
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<p>The <code>FieldBasedLogFormatter</code> provides a simple interface for constructing
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a customized <code><a href="../Protocols/LogFormatter.html">LogFormatter</a></code> by specifying different <em>fields</em>.</p>
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<p>Let’s say you wanted to construct a <code><a href="../Protocols/LogFormatter.html">LogFormatter</a></code> that outputs the following
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fields separated by tabs:</p>
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<ul>
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<li>The <code><a href="../Structs/LogEntry.html">LogEntry</a></code>‘s <code>timestamp</code> property as a UNIX time value</li>
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<li>The <code>severity</code> of the <code><a href="../Structs/LogEntry.html">LogEntry</a></code> as a numeric value</li>
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<li>The <code>Payload</code> of the <code><a href="../Structs/LogEntry.html">LogEntry</a></code></li>
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</ul>
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<p>You could do this by constructing a <code>FieldBasedLogFormatter</code> as follows:</p>
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<pre class="highlight swift"><code><span class="k">let</span> <span class="nv">formatter</span> <span class="o">=</span> <span class="kt">FieldBasedLogFormatter</span><span class="p">(</span><span class="nv">fields</span><span class="p">:</span> <span class="p">[</span><span class="o">.</span><span class="nf">timestamp</span><span class="p">(</span><span class="o">.</span><span class="n">unix</span><span class="p">),</span>
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<span class="o">.</span><span class="nf">delimiter</span><span class="p">(</span><span class="o">.</span><span class="n">tab</span><span class="p">),</span>
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<span class="o">.</span><span class="nf">severity</span><span class="p">(</span><span class="o">.</span><span class="n">numeric</span><span class="p">),</span>
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<span class="o">.</span><span class="nf">delimiter</span><span class="p">(</span><span class="o">.</span><span class="n">tab</span><span class="p">),</span>
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<span class="o">.</span><span class="n">payload</span><span class="p">])</span>
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</code></pre>
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</section>
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<section class="section task-group-section">
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<div class="task-group">
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<ul>
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<li class="item">
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<div>
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<code>
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<a name="/s:15CleanroomLogger22FieldBasedLogFormatterC0C0O"></a>
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<a name="//apple_ref/swift/Enum/Field" class="dashAnchor"></a>
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<a class="token" href="#/s:15CleanroomLogger22FieldBasedLogFormatterC0C0O">Field</a>
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</code>
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</div>
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<div class="height-container">
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<div class="pointer-container"></div>
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<section class="section">
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<div class="pointer"></div>
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<div class="abstract">
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<p>The individual <code>Field</code> declarations for the <code><a href="../Classes/FieldBasedLogFormatter.html">FieldBasedLogFormatter</a></code>.</p>
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<a href="../Classes/FieldBasedLogFormatter/Field.html" class="slightly-smaller">See more</a>
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</div>
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<div class="declaration">
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<h4>Declaration</h4>
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<div class="language">
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<p class="aside-title">Swift</p>
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<pre class="highlight"><code><span class="kd">public</span> <span class="kd">enum</span> <span class="kt">Field</span></code></pre>
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</div>
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</div>
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</section>
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</div>
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</li>
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<li class="item">
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<div>
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<code>
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<a name="/s:15CleanroomLogger22FieldBasedLogFormatterCACSayAC0C0OG6fields_Sb8hardFailtcfc"></a>
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<a name="//apple_ref/swift/Method/init(fields:hardFail:)" class="dashAnchor"></a>
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<a class="token" href="#/s:15CleanroomLogger22FieldBasedLogFormatterCACSayAC0C0OG6fields_Sb8hardFailtcfc">init(fields:hardFail:)</a>
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</code>
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</div>
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<div class="height-container">
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<div class="pointer-container"></div>
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<section class="section">
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<div class="pointer"></div>
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<div class="abstract">
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<p>Initializes the <code>FieldBasedLogFormatter</code> to use the specified fields.</p>
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</div>
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<div class="declaration">
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<h4>Declaration</h4>
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<div class="language">
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<p class="aside-title">Swift</p>
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<pre class="highlight"><code><span class="kd">public</span> <span class="nf">init</span><span class="p">(</span><span class="nv">fields</span><span class="p">:</span> <span class="p">[</span><span class="kt"><a href="../Classes/FieldBasedLogFormatter/Field.html">Field</a></span><span class="p">],</span> <span class="nv">hardFail</span><span class="p">:</span> <span class="kt">Bool</span> <span class="o">=</span> <span class="kc">false</span><span class="p">)</span></code></pre>
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</div>
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</div>
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<div>
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<h4>Parameters</h4>
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<table class="graybox">
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<tbody>
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<tr>
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<td>
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<code>
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<em>fields</em>
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</code>
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</td>
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<td>
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<div>
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<p>The <code>Field</code>s that will be used by the receiver.</p>
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</div>
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</td>
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</tr>
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<tr>
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<td>
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<code>
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<em>hardFail</em>
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</code>
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</td>
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<td>
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<div>
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<p>Determines the behavior of <code>format(_:)</code> when one of
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the receiver’s <code>formatters</code> returns <code>nil</code>. When <code>false</code>, if any formatter
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returns <code>nil</code>, it is simply excluded from the concatenation, but formatting
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continues. Unless <em>none</em> of the <code>formatters</code> returns a string, the
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receiver will always return a non-<code>nil</code> value. However, when <code>hardFail</code>
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is <code>true</code>, <em>all</em> of the <code>formatters</code> must return strings; if <em>any</em>
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formatter returns <code>nil</code>, the receiver <em>also</em> returns <code>nil</code>.</p>
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</div>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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</section>
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</div>
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</li>
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<li class="item">
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<div>
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<code>
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<a name="/s:15CleanroomLogger22FieldBasedLogFormatterCACSayAA0eF0_pG10formatters_Sb8hardFailtcfc"></a>
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<a name="//apple_ref/swift/Method/init(formatters:hardFail:)" class="dashAnchor"></a>
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<a class="token" href="#/s:15CleanroomLogger22FieldBasedLogFormatterCACSayAA0eF0_pG10formatters_Sb8hardFailtcfc">init(formatters:hardFail:)</a>
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</code>
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</div>
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<div class="height-container">
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<div class="pointer-container"></div>
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<section class="section">
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<div class="pointer"></div>
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||
<div class="abstract">
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<p>Initializes the <code>FieldBasedLogFormatter</code> to use the specified formatters.</p>
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</div>
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<div class="declaration">
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<h4>Declaration</h4>
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<div class="language">
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<p class="aside-title">Swift</p>
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<pre class="highlight"><code><span class="kd">public</span> <span class="k">override</span> <span class="nf">init</span><span class="p">(</span><span class="nv">formatters</span><span class="p">:</span> <span class="p">[</span><span class="kt"><a href="../Protocols/LogFormatter.html">LogFormatter</a></span><span class="p">],</span> <span class="nv">hardFail</span><span class="p">:</span> <span class="kt">Bool</span> <span class="o">=</span> <span class="kc">false</span><span class="p">)</span></code></pre>
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</div>
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</div>
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<div>
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<h4>Parameters</h4>
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<table class="graybox">
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<tbody>
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<tr>
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<td>
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<code>
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<em>formatters</em>
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</code>
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</td>
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<td>
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<div>
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<p>The <code>LogFormatter</code>s that will be used by the
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receiver.</p>
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</div>
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</td>
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</tr>
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<tr>
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<td>
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<code>
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<em>hardFail</em>
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</code>
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</td>
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<td>
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<div>
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<p>Determines the behavior of <code>format(_:)</code> when one of
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the receiver’s <code>formatters</code> returns <code>nil</code>. When <code>false</code>, if any formatter
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returns <code>nil</code>, it is simply excluded from the concatenation, but formatting
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continues. Unless <em>none</em> of the <code>formatters</code> returns a string, the
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receiver will always return a non-<code>nil</code> value. However, when <code>hardFail</code>
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is <code>true</code>, <em>all</em> of the <code>formatters</code> must return strings; if <em>any</em>
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formatter returns <code>nil</code>, the receiver <em>also</em> returns <code>nil</code>.</p>
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</div>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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</section>
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</div>
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</li>
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</ul>
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<p>© 2015-2017 <a class="link" href="http://tech.gilt.com/" target="_blank" rel="external">Gilt Groupe</a></p>
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