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: svd.rs
    path of file: ./repos/smartcore/src/linalg/traits
    
    the code of the file until where you have to start completion: //! # SVD Decomposition
//!
//! Any _m_ by _n_ matrix \\(A\\) can be factored into:
//!
//! \\[A = U \Sigma V^T\\]
//!
//! Where columns of \\(U\\) are eigenvectors of \\(AA^T\\) 
    
    fn decompose_restore() {
        let a =
            DenseMatrix::from_2d_array(&[&[1.0, 2.0, 3.0, 4.0], &[5.0, 6.0, 7.0, 8.0]]).unwrap();
        let svd = a.svd().unwrap();
        let u: &DenseMatrix<f32> = &svd.U; //U
        let v: &DenseMatrix<f32> = &svd.V; // V
        let s: &DenseMatrix<f32> = &svd.S(); // Sigma

        let a_hat = u.matmul(s).matmul(&v.transpose());

        assert!(relative_eq!(a, a_hat, epsilon = 1e-3));
    }