default Map<String, Object> getDSSJobContent() {
        return (Map<String, Object>) getParameter("dssJobContent");
    }
This is the content of the DSS job content, when users try to create a DSS job in DSS front-web.
the third-part AppConn usually will call this method to get dssJobContent to do some operation.
@return a dssJobContent related a dss job created by dss framework.
dss-standard/development-standard/development-process-standard/src/main/java/com/webank/wedatasphere/dss/standard/app/development/ref/DSSJobContentRequestRef.java