Cesium.ClassificationPrimitive is not a constructor

CesiumJS
1

I was trying to play around 3D tiles highlighting feature, I came across following example from Sandcastle.
var center = new Cesium.Cartesian3(1216378.730451297, -4736275.917774027, 4081266.871000864);
var modelMatrix = Cesium.Transforms.eastNorthUpToFixedFrame(center);
var hprRotation = Cesium.Matrix3.fromHeadingPitchRoll(new Cesium.HeadingPitchRoll(2.619728786416368, 0.0, 0.0));
var hpr = Cesium.Matrix4.fromRotationTranslation(hprRotation, new Cesium.Cartesian3(0.0, 0.0, -2.0));
Cesium.Matrix4.multiply(modelMatrix, hpr, modelMatrix);

var buildingHighlight = scene.primitives.add(new Cesium.ClassificationPrimitive({
    geometryInstances : new Cesium.GeometryInstance({
        geometry : Cesium.BoxGeometry.fromDimensions({
            vertexFormat : Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
            dimensions : new Cesium.Cartesian3(8.0, 5.0, 8.0)
        }),
        modelMatrix : modelMatrix,
        attributes : {
            color : Cesium.ColorGeometryInstanceAttribute.fromColor(new Cesium.Color(1.0, 0.0, 0.0, 0.5)),
            show : new Cesium.ShowGeometryInstanceAttribute(true)
        },
        id : 'volume'
    }),
    classificationType : Cesium.ClassificationType.CESIUM_3D_TILE
}));

I tried to use the same in my page, but I get first error for "Uncaught TypeError: Cannot read property 'CESIUM_3D_TILE' of undefined"

If I try to comment classificationType row, then I get "Uncaught TypeError: Cesium.ClassificationPrimitive is not a constructor" error. I see other Cesium features works fine, so Cesium is loaded properly.

2

What version of Cesium are you using? ClassificationType was added in Cesium 1.43 and ClassificationPrimitive was added in Cesium 1.36.

3

I'm using Cesium 1.44 version.