Lists all available custom properties of the specified report element.
GET <webiURL>/documents/{documentId}/reports/{reportId}/elements/{elementId}/properties
Response type: application/xml or application/json
Response body: the list of keys and values of custom properties.
GET <webiURL>/documents/1234/reports/1/elements/100/properties
Response:
<properties> <property key="KEY01">Value01</property> <property key="KEY#2">2nd properties</property> </properties>