public NumberExpression<Double> area() {
        if (area == null) {
            area = Expressions.numberOperation(Double.class, SpatialOps.AREA, mixin);
        }
        return area;
    }
The area of this Surface, as measured in the spatial reference system of this Surface.

@return area
querydsl-spatial/src/main/java/com/querydsl/spatial/locationtech/jts/JTSSurfaceExpression.java