'#description'=>$this->t('How the values should be formatted.'),
'#default_value'=>$this->options['format'],
'#group'=>'options][more',
];
if(!empty($this->definition['many to one'])){
$form['add_table']=[
'#type'=>'checkbox',
'#title'=>$this->t('Allow multiple filter values to work together'),
'#description'=>$this->t('If selected, multiple instances of this filter can work together, as though multiple values were supplied to the same filter. This setting is not compatible with the "Reduce duplicates" setting.'),