src/Controllers/HistoryControllerFactory.php
public function isEnabled(SiteTree $record)
    {
        $enabledResults = $this->extend('updateIsEnabled', $record);
        return (empty($enabledResults) || min($enabledResults) !== false);
    }
public function isEnabled(SiteTree $record)
    {
        $enabledResults = $this->extend('updateIsEnabled', $record);
        return (empty($enabledResults) || min($enabledResults) !== false);
    }
public function isEnabled ( SiteTree $ record ) { $ enabledResults = $ this -> extend ( 'updateIsEnabled' , $ record ) ; return ( empty ( $ enabledResults ) || min ( $ enabledResults ) !== false ) ; }
Only deactivate for pages that have a history viewer capability removed. Extensions can provide their
own two cents about this criteria.

@param SiteTree $record
@return bool
Only deactivate for pages that have a history viewer capability removed . Extensions can provide their own two cents about this criteria .