 class="keyword">typename</span> T&gt; <span class="keyword">friend</span> class ::PROTOBUF_NAMESPACE_ID::Arena::InternalHelper;</div>
<div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;  <span class="keyword">typedef</span> <span class="keywordtype">void</span> InternalArenaConstructable_;</div>
<div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;  <span class="keyword">typedef</span> <span class="keywordtype">void</span> DestructorSkippable_;</div>
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