Magento2: Store Configuration Table with multiple fields with multuselect

Can you please help us how we can add multiselect fields in addColumn?

protected function _prepareToRender() {

    $this->addColumn('field_1', ['label' => __('Field 1')]);
    $this->addColumn('field_2', ['label' => __('Field 2')]);
    $this->addColumn('field_3', ['label' => __('Field 3')]);
    $this->addColumn('field_4', ['label' => __('Field 4')]);
    $this->_addAfter       = FALSE;
    $this->_addButtonLabel = __('Add');
}

how we can add column for multiselect fields in configuration?