I am so confused about the type, it should be "string" but it says it can't be any

    public getHashCode(): number {
        const { X, Y, Z } = this.position;
        const positionString: string = `${X}${Y}${Z}`;

        if (typeIs(positionString, "string")) {
            return Crc32(positionString);
        }
        return 0;
    }

    public getHashCode(): number {
        const { X, Y, Z } = this.position;
        const positionString: string = `${X}${Y}${Z}`;

        if (typeIs(positionString, "string")) {
            return Crc32(positionString);
        }
        return 0;
    }