private function setup_pages() {

		$args                 = array(
			'capability' => 'manage_options',
			'icon'       => null,
			'position'   => null,
		);
		$this->struct['args'] = array_merge( $args, $this->struct );

		if ( ! isset( $this->struct['parent'] ) ) {
			add_action( 'admin_menu', array( $this, 'add_settings_page' ), 9 );
		} else {
			add_action( 'admin_menu', array( $this, 'add_sub_page' ), 9 );
		}

	}