public override bool Equals(object obj)
            {
                if (obj == null)
                {
                    return(false);
                }

                if (obj is Coordinates)
                {
                    Coordinates other = (Coordinates)obj;
                    if (chunk.Equals(other.chunk) && indices.Equals(other.indices))
                    {
                        return(true);
                    }
                }
                return(false);
            }