public NumberExpression<Double> y() {
        if (y == null) {
            y = Expressions.numberOperation(Double.class, SpatialOps.Y, mixin);
        }
        return y;
    }
The y-coordinate value for this Point.

@return y-coordinate
querydsl-spatial/src/main/java/com/querydsl/spatial/jts/JTSPointExpression.java