{"relationships": [{
 "id": 0,
 "name": "MailboxIssueRelate",
 "backwardPathLabel": "MailboxIssue",
 "originLayerId": 0,
 "originPrimaryKey": "GlobalID_1",
 "forwardPathLabel": "MailboxIssueComment",
 "destinationLayerId": 1,
 "originForeignKey": "Guid",
 "rules": [],
 "cardinality": "esriRelCardinalityOneToMany",
 "attributed": false,
 "composite": true
}]}