how to require the Unyson Framework on your theme / plugin without TGM

Without TGM

Here's it:

in your theme (functions.php) / plugin (plugin-name.php) file drop this
//wp error messages system function
function PLUGIN_NAME_requirement_admin_notice() {
?>
<div class="error">
    <p><?php _e( 'PLUGIN_NAME requires <a href="'.get_admin_url().'/plugin-install.php?tab=plugin-information&plugin=PLUGIN_ID&TB_iframe=true" class="thickbox" aria-label="More information about Unyson" data-title="Unyson">Unyson Framework</a>', 'YOUR_TEXT_DOMAIN' ); ?></p>
</div>
<?php
}
//check framework and show message
include_once( ABSPATH . 'wp-admin/includes/plugin.php' );
if ( is_plugin_inactive('unyson/unyson.php') ) {
add_action( 'admin_notices', 'PLUGIN_NAME_requirement_admin_notice' );
}
replace all PLUGIN_NAME with what it says
replace all PLUGIN_ID with the exact plugin name, like unyson
replace YOUR_TEXT_DOMAIN with your own
Disable / enable the UNYSON plugin to check if this code works (it's perfect for me).