Upgrade Safe Line_Items.php for AOS_Products_Quotes

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Seems I’m still getting stuck. Maybe I can be pushed in the right direction? Suite is picking up my extension but not fully overriding the dictionary element I want. It’s trying to redeclare it twice. Once from the normal directory and again from the custom directory.

Step 1:
Copied
/modules/AOS_Products_Quotes/Line_Items.php to
custom/modules/AOS_Products_Quotes/Line_Items.php

Step 2:
created file called ´_override_vardefs.phpincustom/Extension/modules/AOS_Invoices//Ext/Vardefs/`

Step 3:
Populated _override_vardefs.php with the following code

    <?php

          $dictionary['AOS_Invoices']['fields']['line_items']['function'] = array(
                        'name' => 'display_lines',
                        'returns' => 'html',
                        'include' => 'custom/modules/AOS_Products_Quotes/Line_Items.php');
      ?>

Step 4: Executed QRR
Now when I go to an invoice, I get an Ajax error and the invoice page wont load.

Looking at my httpd error_log I have the following error:

PHP Fatal error:  Cannot redeclare display_lines() 
(previously declared in /var/www/html/SSIDemo/custom/modules
/AOS_Products_Quotes/Line_Items.php:25) in /var/www/html/SSIDemo/modules
/AOS_Products_Quotes/Line_Items.php on line 222, 
referer: http://192.168.1.157/SSIDemo/index.php?action=ajaxui