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

const extrudedPolygonTechnique = technique as ExtrudedPolygonTechnique;
                colorMix =
                    extrudedPolygonTechnique.lineColorMix !== undefined
                        ? extrudedPolygonTechnique.lineColorMix
                        : EdgeMaterial.DEFAULT_COLOR_MIX;
            }
        }

        const fadeNear =
            technique.fadeNear !== undefined
                ? getPropertyValue(technique.fadeNear, displayZoomLevel)
                : FadingFeature.DEFAULT_FADE_NEAR;
        const fadeFar =
            technique.fadeFar !== undefined
                ? getPropertyValue(technique.fadeFar, displayZoomLevel)
                : FadingFeature.DEFAULT_FADE_FAR;

        const lineFadeNear =
            technique.lineFadeNear !== undefined
                ? getPropertyValue(technique.lineFadeNear, displayZoomLevel)
                : fadeNear;
        const lineFadeFar =
            technique.lineFadeFar !== undefined
                ? getPropertyValue(technique.lineFadeFar, displayZoomLevel)
                : fadeFar;

        if (color === undefined) {
            color = EdgeMaterial.DEFAULT_COLOR;
        }

        return {
            color,