This extension hook has no documentation on MediaWiki.org. Please improve MediaWiki by adding documentation to it. See Template:ExtensionHook for instructions on how to do it.

For examples of extensions using this hook, see Category:WikiExplorer::getColumnDefinitions extensions . Category:Extension hooks#WikiExplorer::getColumnDefinitions Category:Undocumented extension hooks#WikiExplorer::getColumnDefinitions Category:Extension hooks provided by WikiExplorer Category:Extension hooks#WikiExplorer::getColumnDefinitions Category:Undocumented extension hooks#WikiExplorer::getColumnDefinitions Category:Extension hooks provided by WikiExplorer