How to use the @here/harp-utils.MathUtils.max2 function in @here/harp-utils

updateMinMaxZoomLevelsFromPoiInfo() {
        if (this.poiInfo !== undefined) {
            if (this.minZoomLevel === undefined) {
                this.minZoomLevel = MathUtils.min2(
                    this.poiInfo.iconMinZoomLevel,
                    this.poiInfo.textMinZoomLevel
                );
            }
            if (this.maxZoomLevel === undefined) {
                this.maxZoomLevel = MathUtils.max2(
                    this.poiInfo.iconMaxZoomLevel,
                    this.poiInfo.textMaxZoomLevel
                );
            }
        }
    }
}

tiles.forEach(tile => {
                minElevation = MathUtils.min2(minElevation, tile.minElevation);
                maxElevation = MathUtils.max2(
                    maxElevation,
                    tile.maxElevation + tile.maxGeometryHeight
                );
            });
        });

for (const source of [a, b]) {
            if (source === undefined) {
                continue;
            }

            for (const sourceInfo of source) {
                const existingInfo = result.find(
                    findItem =>
                        findItem.id === sourceInfo.id ||
                        (findItem.label !== undefined && findItem.label === sourceInfo.label)
                );

                if (existingInfo === undefined) {
                    result.push({ ...sourceInfo });
                } else {
                    existingInfo.year = MathUtils.max2(sourceInfo.year, existingInfo.year);
                    existingInfo.label = getOptionValue(sourceInfo.label, existingInfo.label);
                    existingInfo.link = getOptionValue(sourceInfo.link, existingInfo.link);
                }
            }
        }
        return result;
    }