'Domain (of origin) identifiers for synchronization with
Mariner CommandBridge, a dict {domain: id} where
"domain" means the domain prefix of the record UUID
(e.g. uuid "wrike/IKY0192834" => domain "wrike"),
default domain is "sahana"'

def get_sync_mcb_domain_identifiers(self):

    return self.sync.get('mcb_domain_identifiers', {})
