Use ScrollBar when "import QtQuick.Controls 2.0 as 'SomeTag'"

[carles.sole.grau]

Hi everybody,
I have a problem when I'm trying to add a ScrollBar in a Flickable.
My problem is that I import QtQuick.Controls 2.0 as => "import QtQuick.Controls 2.0 as 'SomeTag'" because I want to differentiate between QtQuick.Controls 1.4.

The example in the doc is like this:

Flickable {
    // ...
    ScrollBar.vertical: ScrollBar { }
}

But to fit in my Code I have to use:

import QtQuick 2.7
import QtQuick.Controls 2.0 as Phone
import QtQuick.Controls 1.4 as Desktop

Phone.Page{
    title: "MyPage"    
    Flickable {
        id: flickable       
        anchors.fill: parent
        contentHeight: flickableChildItem.height
        boundsBehavior: Flickable.StopAtBounds
        Phone.ScrollBar.vertical: Phone.ScrollBar{}
    }//Flickable
}//Page

When I try to run my code, this problem appears:

   qrc:/QML/MyPage.qml:7:5: Cannot assign object to read only list

I would like to keep this:

import QtQuick 2.7
import QtQuick.Controls 2.0 as Phone
import QtQuick.Controls 1.4 as Desktop

Because sometimes I like to use some QtQuick.Controls 1.4 Item.

Thank you very much