I have enabled bootstrap3 grid framework for Fruitful theme.
And in bootstrap3.php , i have below function which add row of col-sm-x class.
But i want to add rows with col-md-x classes. so i have customized the function,


public function getPageThemeGridFrameworkColumnClasses()
{
$columns = array(
'col-md-1',
'col-md-2',
'col-md-3',
'col-md-4',
'col-md-5',
'col-md-6',
'col-md-7',
'col-md-8',
'col-md-9',
'col-md-10',
'col-md-11',
'col-md-12'
);
return $columns;
}

But it is still adding rows with col-sm-x, instead of col-md-x.
Am i forgetting any step to be performed ?
Thanks