public static JTSGeometryExpression<?> extent(Expression<? extends GeometryCollection> collection) {
        return geometryOperation(SpatialOps.EXTENT, collection);
    }
Returns the bounding box that bounds rows of geometries.

@param collection geometry collection
@return geometry collection
querydsl-spatial/src/main/java/com/querydsl/spatial/locationtech/jts/JTSGeometryExpressions.java