presto-geospatial/src/main/java/io/prestosql/plugin/geospatial/BingTile.java/BingTile/equals
class BingTile:    @Override
    public boolean equals(Object other)
    {
        if (this == other) {
            return true;
        }

        if (other == null || getClass() != other.getClass()) {
            return false;
        }

        BingTile otherTile = (BingTile) other;
        return this.x == otherTile.x &&
                this.y == otherTile.y &&
                this.zoomLevel == otherTile.zoomLevel;
    }