y|false Child type or false if it's not a valid widget.
	 */
	protected function _get_default_child_type( array $element_data ) {
		return Plugin::$instance->elements_manager->get_element_types( 'section' );
	}

	/**
	 * Get repeater setting key.
	 *
	 * Retrieve the unique setting key for the current repeater item. Used to connect the current element in the
	 * repeater to it's settings model and it's control in the panel.
	 *
	 * PHP usage (inside `Widget_Base::render()` method):
	 *
	 *    $tabs = $this->get_settings( 'tabs' );
	 *    foreach ( $tabs as $index => $item ) {
	 *        $tab_title_setting_key = $this->get_repeater_setting_key( 'tab_title', 'tabs', $index );
	 *        $this->add_inline_editing_attributes( $tab_title_setting_key, 'none' );
	 *        echo '<div ' . $this->get_render_attribute_string( $tab_title_setting_key ) . '>' . $item['tab_title'] . '</div>';
	 *    }
	 *
	 * @since 1.8.0
	 * @access protected
	 *
	 * @param string $setting_key      The current setting key inside the repeater item (e.g. `tab_title`).
	 * @param string $repeater_key     The repeater key containing the array of all the items in the repeater (e.g. `tabs`).
	 * @param int $repeater_item_index The current item index in the repeater array (e.g. `3`).
	 *
	 * @return string The repeater setting key (e.g. `tabs.3.tab_title`).
	 */
	protected function get_repeater_setting_key( $setting_key, $repeater_key, $repeater_item_index ) {
		return implode( '.', [ $repeater_key, $repeater_item_index, $setting_key ] );
	}

	/**
	 * Add inline editing attributes.
	 *
	 * Define specific area in the element to be editable inline. The element can have several areas, with this method
	 * you can set the area inside the element that can be edited inline. You can also define the type of toolbar the
	 * user will see, whether it will be a basic toolbar or an advanced one.
	 *
	 * Note: When you use wysiwyg control use the advanced toolbar, with textarea control use the basic toolbar. Text
	 * control should not have toolbar.
	 *
	 * PHP usage (inside `Widget_Base::render()` method):
	 *
	 *    $this->add_inline_editing_attributes( 'text', 'advanced' );
	 *    echo '<div ' . $this->get_render_attribute_string( 'text' ) . '>' . $this->get_settings( 'text' ) . '</div>';
	 *
	 * @since 1.8.0
	 * @access protected
	 *
	 * @param string $key     Element key.
	 * @param string $toolbar Optional. Toolbar type. Accepted values are `advanced`, `basic` or `none`. Default is
	 *                        `basic`.
	 */
	protected function add_inline_editing_attributes( $key, $toolbar = 'basic' ) {
		if ( ! Plugin::$instance->editor->is_edit_mode() ) {
			return;
		}

		$this->add_render_attribute( $key, [
			'class' => 'elementor-inline-editing',
			'data-elementor-setting-key' => $key,
		] );

		if ( 'basic' !== $toolbar ) {
			$this->add_render_attribute( $key, [
				'data-elementor-inline-editing-toolbar' => $toolbar,
			] );
		}
	}

	/**
	 * Add new skin.
	 *
	 * Register new widget skin to allow the user to set custom designs. Must be
	 * called inside the `register_skins()` method.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @param Skin_Base $skin Skin instance.
	 */
	public function add_skin( Skin_Base $skin ) {
		Plugin::$instance->skins_manager->add_skin( $this, $skin );
	}

	/**
	 * Get single skin.
	 *
	 * Retrieve a single skin based on skin ID, from all the skin assigned to
	 * the widget. If the skin does not exist or not assigned to the widget,
	 * return false.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @param string $skin_id Skin ID.
	 *
	 * @return string|false Single skin, or false.
	 */
	public function get_skin( $skin_id ) {
		$skins = $this->get_skins();
		if ( isset( $skins[ $skin_id ] ) ) {
			return $skins[ $skin_id ];
		}

		return false;
	}

	/**
	 * Get current skin ID.
	 *
	 * Retrieve the ID of the current skin.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @return string Current skin.
	 */
	public function get_current_skin_id() {
		return $this->get_settings( '_skin' );
	}

	/**
	 * Get current skin.
	 *
	 * Retrieve the current skin, or if non exist return false.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @return Skin_Base|false Current skin or false.
	 */
	public function get_current_skin() {
		return $this->get_skin( $this->get_current_skin_id() );
	}

	/**
	 * Remove widget skin.
	 *
	 * Unregister an existing skin and remove it from the widget.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @param string $skin_id Skin ID.
	 *
	 * @return \WP_Error|true Whether the skin was removed successfully from the widget.
	 */
	public function remove_skin( $skin_id ) {
		return Plugin::$instance->skins_manager->remove_skin( $this, $skin_id );
	}

	/**
	 * Get widget skins.
	 *
	 * Retrieve all the skin assigned to the widget.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @return Skin_Base[]
	 */
	public function get_skins() {
		return Plugin::$instance->skins_manager->get_skins( $this );
	}

	/**
	 * Get group name.
	 *
	 * Some widgets need to use group names, this method allows you to create them.
	 * By default it retrieves the regular name.
	 *
	 * @since 3.3.0
	 * @access public
	 *
	 * @return string Unique name.
	 */
	public function get_group_name() {
		return $this->get_name();
	}

	/**
	 * Get Inline CSS dependencies.
	 *
	 * Retrieve a list of inline CSS dependencies that the element requires.
	 *
	 * @since 3.3.0
	 * @access public
	 *
	 * @return array.
	 */
	public function get_inline_css_depends() {
		return [];
	}

	/**
	 * @param string $plugin_title  Plugin's title
	 * @param string $since         Plugin version widget was deprecated
	 * @param string $last          Plugin version in which the widget will be removed
	 * @param string $replacement   Widget replacement
	 */
	protected function deprecated_notice( $plugin_title, $since, $last = '', $replacement = '' ) {
		$this->start_controls_section(
			'Deprecated',
			[
				'label' => esc_html__( 'Deprecated', 'elementor' ),
			]
		);

		$this->add_control(
			'deprecated_notice',
			[
				'type' => Controls_Manager::DEPRECATED_NOTICE,
				'widget' => $this->get_title(),
				'since' => $since,
				'last' => $last,
				'plugin' => $plugin_title,
				'replacement' => $replacement,
			]
		);

		$this->end_controls_section();

	}

	public function register_runtime_widget( $widget_name ) {
		self::$registered_runtime_widgets[] = $widget_name;
	}

	public function get_widget_css_config( $widget_name ) {
		$direction = is_rtl() ? '-rtl' : '';

		$has_custom_breakpoints = $this->is_custom_breakpoints_widget();

		$file_name = 'widget-' . $widget_name . $direction . '.min.css';

		// The URL of the widget's external CSS file that is loaded in case that the CSS content is too large to be printed inline.
		$file_url = Plugin::$instance->frontend->get_frontend_file_url( $file_name, $has_custom_breakpoints );

		// The local path of the widget's CSS file that is being read and saved in the DB when the CSS content should be printed inline.
		$file_path = Plugin::$instance->frontend->get_frontend_file_path( $file_name, $has_custom_breakpoints );

		return [
			'key' => $widget_name,
			'version' => ELEMENTOR_VERSION,
			'file_path' => $file_path,
			'data' => [
				'file_url' => $file_url,
			],
		];
	}

	public function get_css_config() {
		return $this->get_widget_css_config( $this->get_group_name() );
	}

	public function get_responsive_widgets_config() {
		$responsive_widgets_data_manager = $this->get_responsive_widgets_data_manager();

		return [
			'key' => $responsive_widgets_data_manager::RESPONSIVE_WIDGETS_DATABASE_KEY,
			'version' => ELEMENTOR_VERSION,
			'file_path' => ELEMENTOR_ASSETS_PATH . $responsive_widgets_data_manager::RESPONSIVE_WIDGETS_FILE_PATH,
		];
	}

	public function get_responsive_widgets() {
		$responsive_widgets_data_manager = $this->get_responsive_widgets_data_manager();

		$config = $this->get_responsive_widgets_config();

		return $responsive_widgets_data_manager->get_asset_data_from_config( $config );
	}

	/**
	 * Get Responsive Widgets Data Manager.
	 *
	 * Retrieve the data manager that handles widgets that are using media queries for custom-breakpoints values.
	 *
	 * @since 3.5.0
	 * @access protected
	 *
	 * @return Responsive_Widgets_Data_Manager
	 */
	protected function get_responsive_widgets_data_manager() {
		if ( ! self::$responsive_widgets_data_manager ) {
			self::$responsive_widgets_data_manager = new Responsive_Widgets_Data_Manager();
		}

		return self::$responsive_widgets_data_manager;
	}

	/**
	 * Is Custom Breakpoints Widget.
	 *
	 * Checking if there are active custom-breakpoints and if the widget use them.
	 *
	 * @since 3.5.0
	 * @access protected
	 *
	 * @return boolean
	 */
	protected function is_custom_breakpoints_widget() {
		$has_custom_breakpoints = Plugin::$instance->breakpoints->has_custom_breakpoints();

		if ( $has_custom_breakpoints ) {
			$responsive_widgets = $this->get_responsive_widgets();

			// The $widget_name can also represents a widgets group name, therefore we need to use the current widget name to check if it's responsive widget.
			$current_widget_name = $this->get_name();

			// If the widget is not implementing custom-breakpoints media queries then it has no custom- css file.
			if ( ! isset( $responsive_widgets[ $current_widget_name ] ) ) {
				$has_custom_breakpoints = false;
			}
		}

		return $has_custom_breakpoints;
	}

	private function get_widget_css() {
		$widgets_css_data_manager = $this->get_widgets_css_data_manager();

		$widgets_list = $this->get_inline_css_depends();

		$widgets_list[] = $this->get_group_name();

		$widget_css = '';

		foreach ( $widgets_list as $widget_data ) {
			$widget_name = isset( $widget_data['name'] ) ? $widget_data['name'] : $widget_data;

			if ( ! in_array( $widget_name, self::$registered_inline_css_widgets, true ) ) {
				if ( $this->get_group_name() === $widget_name ) {
					$config = $this->get_css_config();
				} else {
					/**
					 * The core-dependency allowing to create a dependency specifically with the core widgets.
					 * Otherwise, the config will be taken from the class that inherits from Widget_Base.
					 */
					$is_core_dependency = isset( $widget_data['is_core_dependency'] ) ? true : false;

					$config = $is_core_dependency ? self::get_widget_css_config( $widget_name ) : $this->get_widget_css_config( $widget_name );
				}

				$widget_css .= $widgets_css_data_manager->get_asset_data_from_config( $config );

				self::$registered_inline_css_widgets[] = $widget_name;
			}
		}

		return $widget_css;

	}

	private function is_inline_css_mode() {
		static $is_active;

		if ( null === $is_active ) {
			$is_edit_mode = Plugin::$instance->editor->is_edit_mode();
			$is_preview_mode = Plugin::$instance->preview->is_preview_mode();
			$is_optimized_mode = Plugin::$instance->experiments->is_feature_active( 'e_optimized_css_loading' );

			$is_active = ( Utils::is_script_debug() || $is_edit_mode || $is_preview_mode || ! $is_optimized_mode ) ? false : true;
		}

		return $is_active;
	}

	private function print_widget_css() {
		if ( ! $this->is_inline_css_mode() ) {
			return;
		}

		Utils::print_unescaped_internal_string( $this->get_widget_css() );
	}

	private function get_widgets_css_data_manager() {
		if ( ! self::$widgets_css_data_manager ) {
			self::$widgets_css_data_manager = new Widgets_Css_Data_Manager();
		}

		return self::$widgets_css_data_manager;
	}
}