How can I retreive the Primary Contact of a ticket with Connect PHP?

Summary

How can I retreive the Primary Contact of a ticket with Connect PHP?

Content

Hi community,

I am trying to retreive the contact from the sample ticket on my process designer script, but I get the error "trying to get property of non-object" for most attempts, for others it just doesnt print anything (and I believe the contact is required while creating the ticket so it could not be null, right?.

Thanks for helping!!

EDIT

Solution:

$contact = $inc->PrimaryContact->LookupName;