How to use the @here/harp-materials.enforceBlending function in @here/harp-materials

export function createDepthPrePassMaterial(baseMaterial: THREE.Material): THREE.Material {
    baseMaterial.depthWrite = false;
    baseMaterial.depthFunc = THREE.EqualDepth;
    baseMaterial.colorWrite = true;
    enforceBlending(baseMaterial);

    const depthPassMaterial = baseMaterial.clone();
    depthPassMaterial.depthWrite = true;
    depthPassMaterial.depthTest = true;
    depthPassMaterial.depthFunc = THREE.LessDepth;
    depthPassMaterial.colorWrite = false;
    depthPassMaterial.opacity = 1.0;
    depthPassMaterial.blending = THREE.NoBlending;
    return depthPassMaterial;
}