Metabox as Library

Hello, i use Metabox as lirary in my plugin.
Can you add please a "class_exists" if Statement to all extensions?

Example:

 if (!class_exists('RWMB_Loader'))
      include_once('libraries/meta-box/meta-box.php');

            if (!class_exists('RWMB_Group'))
                include_once('libraries/meta-box-group/meta-box-group.php');

            if (!class_exists('MB_Columns'))
                include_once('libraries/meta-box-columns/meta-box-columns.php');

            if (!class_exists('MB_Conditional_Logic'))
                include_once('libraries/meta-box-conditional-logic/meta-box-conditional-logic.php');

            if (!class_exists('MB_Tabs'))
                include_once('meta-box-tabs/meta-box-tabs.php');

            if(!class_exists('MB_Settings_Page') && !class_exists('MB_Settings_Page_Meta_Box') && !function_exists('mb_settings_page_load'))
                include_once('mb-settings-page/mb-settings-page.php');

Thank you