src/Forms/TabSet.php
public function push(FormField $field)
    {
        if ($field instanceof Tab || $field instanceof TabSet) {
            $field->setTabSet($this);
        }
        parent::push($field);
    }
public function push(FormField $field)
    {
        if ($field instanceof Tab || $field instanceof TabSet) {
            $field->setTabSet($this);
        }
        parent::push($field);
    }
public function push ( FormField $ field ) { if ( $ field instanceof Tab || $ field instanceof TabSet ) { $ field -> setTabSet ( $ this ) ; } parent :: push ( $ field ) ; }
Add a new child field to the end of the set.

@param FormField $field
Add a new child field to the end of the set .