void echo( const QVariant& var ) {
    printf( "%s\n", qPrintable( var.toString() ) );
}

void echo( const QList<QVariantList>& table )
{
    QString str;
    foreach( const QVariantList lst, table ) {
        foreach( const QVariant var, lst ) {
            str += var.toString() + " ";
        }
        echo( str );
    }
}

void echo( const QVariantList& lst )
{
    if( !lst.isEmpty() && lst[0].canConvert<QVariantList>() ) {
        foreach( const QVariant var, lst ) {
            echo( var.toList() );
        }
        return;
    }
    QString str;
    foreach( const QVariant var, lst ) {
        str += var.toString() + " ";
    }
    echo( str );
}