Elementor\Widget_Html::_register_controls PHP Method

    protected function _register_controls()
    {
        $this->start_controls_section('section_title', ['label' => __('HTML Code', 'elementor')]);
        $this->add_control('html', ['label' => '', 'type' => Controls_Manager::TEXTAREA, 'default' => '', 'placeholder' => __('Enter your embed code here', 'elementor'), 'show_label' => false]);
        $this->end_controls_section();
    }