Elementor controls select2

protected function _register_controls(){

    $this->start_controls_section('content_section', [
        'label' => __('Content', 'hestia-elementor'),
        'tab' => \Elementor\Controls_Manager::TAB_CONTENT
    ]);

    $this->add_control('el_select_2', [
        'label' => __('El Select 2', 'elementor-extension'),
        'type' => \Elementor\Controls_Manager::SELECT2,
        'label_block' => true,
        'multiple' => true,
        'options' => [
            'BD' => __('Bangladesh', 'elementor-extension'),
            'BR' => __('Brazil', 'elementor-extension'),
            'AR' => __('Arzentina', 'elementor-extension'),
            'AU' => __('Australia', 'elementor-extension'),
            'DK' => __('Denmark', 'elementor-extension'),
        ]
    ]);

    $this->end_controls_section();

}