emblem counter via dbus

to get:
dbus-send --session --print-reply \
    --dest=com.canonical.Unity.Launcher \
    /com/canonical/Unity/Launcher/dialer_2Dapp \
    org.freedesktop.DBus.Properties.Get \
string:com.canonical.Unity.Launcher.Item \
 string:'count'


to set:
//set emblem count , need to set countVisible to true
dbus-send --session --print-reply \
    --dest=com.canonical.Unity.Launcher \
    /com/canonical/Unity/Launcher/messaging_2Dapp \
    org.freedesktop.DBus.Properties.Set \
    string:com.canonical.Unity.Launcher.Item \
    string:count \
    variant:int32:2
    
    dbus-send --session --print-reply \
    --dest=com.canonical.Unity.Launcher \
    /com/canonical/Unity/Launcher/messaging_2Dapp \
    org.freedesktop.DBus.Properties.Set \
    string:com.canonical.Unity.Launcher.Item \
    string:countVisible \
    variant:boolean:true
        
    qdbus com.canonical.Unity.Launcher /com/canonical/Unity/Launcher/$1 org.freedesktop.DBus.Properties.Set com.canonical.Unity.Launcher.Item countVisible $2
    
    QDBusInterface emblemCounter( "com.canonical.Unity.Launcher", "/com/canonical/Unity/Launcher/messaging_2Dapp",
                              "com.canonical.Unity.Launcher.Item");

    emblemCounter.setProperty("count", unreadCount);
    emblemCounter.setProperty("countVisible", unreadCount > 0);
    //emblemCounter.call(QLatin1String("countVisible"), true);
    QVariant vCount = emblemCounter.property("count");
    qDebug() << "emblem count:" << vCount.toInt();

For focal:

dbus-send --session --print-reply
--dest=com.lomiri.Shell.Launcher
/com/lomiri/Shell/Launcher/dialer_2Dapp
org.freedesktop.DBus.Properties.Get
string:com.lomiri.Shell.Launcher.Item
string:'count'

dbus-send --session --print-reply
--dest=com.lomiri.Shell.Launcher
/com/lomiri/Shell/Launcher/dialer_2Dapp
org.freedesktop.DBus.Properties.Set
string:com.lomiri.Shell.Launcher.Item
string:count
variant:int32:2

dbus-send --session --print-reply
--dest=com.lomiri.Shell.Launcher
/com/lomiri/Shell/Launcher/dialer_2Dapp
org.freedesktop.DBus.Properties.Set
string:com.lomiri.Shell.Launcher.Item
string:countVisible
variant:boolean:true