Workaround missing namespaces in parameter

Component {
    name: "QtDataVisualization::ColorGradient"
    defaultProperty: "stops"
    prototype: "QObject"
    exports: ["QtDataVisualization/ColorGradient 1.0"]
    exportMetaObjectRevisions: [0]
    Property { name: "stops"; type: "ColorGradientStop"; isList: true; isReadonly: true }
    Signal { name: "updated" }
}

Signal {
    name: "multiHighlightGradientChanged"
    Parameter { name: "gradient"; type: "ColorGradient"; isPointer: true }
}