Warning, /system/plasma-packagekit/applet/contents/ui/FilteredTransactionModel.qml is written in an unsupported language. File is not indexed.

 /*
     Copyright © 2017 Harald Sitter <sitter@kde.org>
 
     This program is free software; you can redistribute it and/or
     modify it under the terms of the GNU General Public License as
     published by the Free Software Foundation; either version 2 of
     the License or (at your option) version 3 or any later version
     accepted by the membership of KDE e.V. (or its successor approved
     by the membership of KDE e.V.), which shall act as a proxy
     defined in Section 14 of version 3 of the license.
 
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 import QtQuick 2.0
 
 import org.kde.plasma.core 2.1 as PlasmaCore
 
 import org.kde.plasma.private.packagekit 0.1
 
 PlasmaCore.SortFilterModel {
     sourceModel: TransactionModel {}
 
     property var filters: [] // Whitelist
 
     filterCallback: function(source_row, value) {
         var idx = sourceModel.index(source_row, 0);
         var data = sourceModel.data(idx, sourceModel.role("role"));
         for (var i = 0; i < filters.length; ++i) {
             if (data == filters[i]) {
                 return true;
             }
         }
         return false;
     }
 }