Filter Pop-up based on relationship

Anyone able to get this working? I tried what suggested in sugarcrm filter on relative field - Dev Answers & Best Practices - DevClub - SugarClub so far not working. Here is the code I am adding to custom/Extension/modules/RTPOL_OLP/Ext/Vardefs/sugarfield_contacts_rtpol_olp_1contacts_ida.php

$dictionary['RTPOL_OLP']['fields']['contacts_rtpol_olp_1contacts_ida']['filter_definition'] = [
  [
    'account_id' => '#accounts_rtpol_olp_1accounts_ida'
  ]
];

I am trying to filter Contacts based on Account, but getting this working will lead to other filters.

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