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The PageRenderingCacheService
      service is used to cache the Wiki page content. The
      configuration of this component is found in wiki-service/src/main/resources/conf/portal/configuration.xml:
  
Sample configuration:
<component>
<key>org.exoplatform.wiki.rendering.cache.PageRenderingCacheService</key>
<type>org.exoplatform.wiki.rendering.cache.impl.PageRenderingCacheServiceImpl</type>
</component>