swift_performance_template_dir
All template files are located in wp-content/plugins/swift-performane/template. However you can customize all templates easily if you copy them, and override the template dir
Parameters
$prefix
string contains the absolute path of template dir with trailing slash
Return
string
Example
// Use custom template dir
add_filter('swift_performance_template_dir', function($template_dir){
return '/var/www/html/wp-content/themes/my-theme/swift-performance-templates/';
});