How to get NOT NULL records from Reportable REST API?
I've this REST API :
https://<>/ccm/rpt/repository/workitem?fields=workitem/workItem[projectArea/name=%27Defect%20Management%27]/(id|summary|allExtensions[displayName=%27External%20ID%27%20or%20displayName=%27Application%20Fixed%20In%27]/(displayName|displayValue))
I want to set displayValue= NOT NULL for my displayName='External ID' attribute.