public function build()
    {
        $config = parent::build();
        $fields = $this->fieldsBuilder->build();
        $config['sub_fields'] = $fields['fields'];
        return $config;
    }
public function build()
    {
        $config = parent::build();
        $fields = $this->fieldsBuilder->build();
        $config['sub_fields'] = $fields['fields'];
        return $config;
    }
public function build ( ) { $ config = parent :: build ( ) ; $ fields = $ this -> fieldsBuilder -> build ( ) ; $ config [ 'sub_fields' ] = $ fields [ 'fields' ] ; return $ config ; }
Return a group field configuration array
@return array
Return a group field configuration array