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: line_string.rs
    path of file: ./repos/geo/geo-types/src/geometry
    
    the code of the file until where you have to start completion: #[cfg(any(feature = "approx", test))]
use approx::{AbsDiffEq, RelativeEq};

use crat
    
    fn test_exact_size() {
        // see https://github.com/georust/geo/issues/762
        let first = coord! { x: 0., y: 0. };
        let ls = LineString::new(vec![first, coord! { x: 10., y: 0. }]);

        // reference to force the `impl IntoIterator for &LineString` impl, giving a `CoordinatesIter`
        for c in (&ls).into_iter().rev().skip(1).rev() {
            assert_eq!(&first, c);
        }
        for p in ls.points().rev().skip(1).rev() {
            assert_eq!(Point::from(first), p);
        }
    }