diff --git a/libdiscover/utils.h b/libdiscover/utils.h
index d58aa0f2..6066a2a4 100644
--- a/libdiscover/utils.h
+++ b/libdiscover/utils.h
@@ -1,134 +1,145 @@
 /***************************************************************************
  *   Copyright ?? 2012 Aleix Pol Gonzalez <aleixpol@blue-systems.com>       *
  *                                                                         *
  *   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/>. *
  ***************************************************************************/
 
 #ifndef UTILS_H
 #define UTILS_H
 
 #include <functional>
 #include <QString>
 #include <QElapsedTimer>
 
 class OneTimeAction : public QObject
 {
 public:
     OneTimeAction(const std::function<void()> &func, QObject* parent) : QObject(parent), m_function(func) {}
 
     void trigger() {
         m_function();
         deleteLater();
     }
 
 private:
     std::function<void()> m_function;
 };
 
 template <typename T, typename Q, typename _UnaryOperation>
 static T kTransform(const Q &input, _UnaryOperation op)
 {
     T ret;
     ret.reserve(input.size());
     for(const auto& v : input) {
         ret += op(v);
     }
     return ret;
 }
 
+template <typename T, typename Q, typename _UnaryOperation>
+static T kAppend(const Q &input, _UnaryOperation op)
+{
+    T ret;
+    ret.reserve(input.size());
+    for(const auto& v : input) {
+        ret.append(op(v));
+    }
+    return ret;
+}
+
 template <typename T, typename Q, typename _UnaryOperation>
 static T kFilter(const Q &input, _UnaryOperation op)
 {
     T ret;
     for(const auto& v : input) {
         if (op(v))
             ret += v;
     }
     return ret;
 }
 
 template <typename Q, typename W>
 static int kIndexOf(const Q& list, W func)
 {
     int i = 0;
     for (auto it = list.constBegin(), itEnd = list.constEnd(); it!=itEnd; ++it) {
         if (func(*it))
             return i;
         ++i;
     }
     return -1;
 }
 
 template <typename Q, typename W>
 static bool kContains(const Q& list, W func)
 { return std::any_of(list.begin(), list.end(), func); }
 
 template <typename T>
 static QVector<T> kSetToVector(const QSet<T> & set)
 {
     QVector<T> ret;
     ret.reserve(set.size());
     for(auto &x: set)
         ret.append(x);
     return ret;
 }
 
 template <typename T>
 static QSet<T> kToSet(const QVector<T> & set)
 {
 #if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
     return QSet<T>(set.begin(), set.end());
 #else
     QSet<T> ret;
     ret.reserve(set.size());
     for(auto &x: set)
         ret.insert(x);
     return ret;
 #endif
 }
 
 template <typename T>
 static QSet<T> kToSet(const QList<T> & set)
 {
 #if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
     return QSet<T>(set.begin(), set.end());
 #else
     return set.toSet();
 #endif
 }
 
 class ElapsedDebug : private QElapsedTimer
 {
 public:
     ElapsedDebug(const QString &name = QStringLiteral("<unnamed>")) : m_name(name) { start(); }
     ~ElapsedDebug() { qDebug("elapsed %s: %lld!", m_name.toUtf8().constData(), elapsed()); }
     void step(const QString &step) { qDebug("step %s(%s): %lld!", m_name.toUtf8().constData(), qPrintable(step), elapsed()); }
 
     QString m_name;
 };
 
 class CallOnDestroy : public QObject
 {
 public:
     CallOnDestroy(std::function<void()> f) : m_func(std::move(f)) {}
     ~CallOnDestroy() { m_func(); }
 
 private:
     std::function<void()> m_func;
 };
 
 #endif