public JTSGeometryExpression<Geometry> geometryN(Integer n) {
        return JTSGeometryExpressions.geometryOperation(SpatialOps.GEOMETRYN, mixin, ConstantImpl.create(n));
    }
Returns the Nth geometry in this GeometryCollection.

@param n one based index
@return matching geometry
querydsl-spatial/src/main/java/com/querydsl/spatial/jts/JTSGeometryCollectionExpression.java