private function _add_conditions_prefix($controls)
{
foreach ($controls as &$control) {
if (empty($control['condition'])) {
continue;
}
$prefixed_condition_keys = array_map(function ($key) {
return $this->get_controls_prefix() . $key;
}, array_keys($control['condition']));
$control['condition'] = array_combine($prefixed_condition_keys, $control['condition']);
}
return $controls;
}