重命名的类型

# CMakeLists.txt
set_source_files_properties(Tree.qml PROPERTIES QT_QML_SOURCE_TYPENAME BinaryTree)
qt_add_qml_module(MyModule
    URI MyModule
    QML_FILES Tree.qml
)

// Tree.qml
import QtQml

Item {
    property Tree left // uses old name - not ok
    property Tree right // uses old name - not ok
}

// Tree.qml
import QtQml

Item {
    property BinaryTree left // uses new name - ok
    property BinaryTree right // uses new name - ok
}