Something

    // Find non-empty workspaces (has more than 0 children).
    public static void savedSearchFindNonEmptyWorkspace()  throws Exception
    {
        // Get the appropriate manager interfaces from the connector.
        Searcher  searcher = Connector.getSearcher();
        WorkspaceManager workspaceManager = Connector.getWorkspaceManager();

        // Create the query object.
        Query   query = new Query( ObjectType.WORKSPACE );

        // Add typical return attributes.
        query.addReturnAttribute( "name" );
        query.addReturnAttribute( "parentWorkspaces.assets.name" );
        query.addReturnAttribute( "NDA_Only" );
        query.addReturnAttribute( "CATEGORY" );
        query.addReturnAttribute( "childrenCount" );

        // Request the permission attribute.
        query.addReturnAttribute( Permissions.PERMISSIONS_VAR );

        // Add sort by name.
        query.addSortBy( "name" );
        query.addSortBy( "party.name", Query.DESCENDING + Query.IGNORE_CASE );

        query.addCondition( "assetChildrenCount", Query.Operators.GT, IntegerUtil.ZERO );

        // Create the saved search.
        String savedSeachUuid = workspaceManager.createSavedSearch( s_userAuth,
                                                                    s_orgUuid,
                                                                    null, // no parent workspace
                                                                    "Saved Workspace Search",
                                                                    "Some Notes",
                                                                    query,
                                                                    null );

       Collection savedWorkspaceInfos =
           workspaceManager.getChildrenWorkspaceInfo(s_userAuth,
                                                     savedSeachUuid, //parent workspace uuid
                                                     null, // any children workspace types
                                                     0,    // start index at 0
                                                     10 ); // return max of 10 count

       ExampleUtil.printWorkspaceInfo(savedWorkspaceInfos);
    }