You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: mod.rs
    path of file: ./repos/cnosdb/query_server/query/src/extension/expr/scalar_function/gis
    
    the code of the file until where you have to start completion: mod st_area;
mod st_asbinary;
mod st_binary_op;
mod st_distance;
mod st_geomfromwkb;

use datafusion:
    
    fn test_to_wkt() {
        let p = point!(x: 1.2, y: 1.3);
        let pe: Geometry = p.into();

        let wkt = pe.to_wkt().unwrap();

        assert_eq!("POINT(1.2 1.3)", &wkt)
    }