Click to change boolean value in list view not update

[Tje123]

Im developing carrier module.in my backoffice i have bool value.

in my field list like below 

public function renderList() {
        $this->addRowAction('edit');
        $this->addRowAction('delete');
        $this->bulk_actions = [
            'delete' => [
                'text' => $this->l('Delete selected'),
                'confirm' => $this->l('Delete selected items?')
            ]
        ];
        $this->fields_list = [

        'availability' => [
                'title' => $this->l('Availability'),
                'width' => 90,
                'active' => 'Availability',
                'type' => 'bool',
                'orderby' => FALSE
            ],

]

 

in my class i have define it like below

  public $availability=true;

 

when i click on the `red cross` it's not updating.