====== SystemPartnerLocationBackendReference ======
This function returns the SystemPartner's stored ILN to the transferred GLN. \\\
The second argument can be an //Auto-Add-Value// (True, False). If //True// is specified, the ILN is created again if it does not exist. \\
==== Syntax : ====
SystemPartnerLocationBackendReference('GLN')
SystemPartnerLocationBackendReference('GLN', 'AutoAdd')