On this pageUnionsDocumentResult Resolves either to a document or an error. Possible types Document MobiledockError YardAssetChange Possible types YardAssetPositionChange YardAssetTimeAssignmentChange YardAssetTasksChange YardAssetStatusChange YardAssetInboundBookingChange YardAssetOutboundBookingChange YardAssetIDChange YardAssetTypeChange YardAssetInboundTimeRangeChange YardAssetOutboundTimeRangeChange