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: slice_slice_projection.rs
    path of file: ./repos/kani/tests/kani/Projection
    
    the code of the file until where you have to start completion: // Copyright Kani Contributors
// SPDX-License-Identifier: Apache-2.0 OR MIT
// kani-flags: --default-unwind 5

//! This test case checks the usage of slices of slices (&[&[T]]).
use std::mem::size_of_val;

/// St
    
fn check_slice_my_str() {
    let mut buf_0 = String::from("000");
    let mut buf_1 = String::from("001");
    let my_slice = &[MyStr::new(&mut buf_0), MyStr::new(&mut buf_1)];
    assert_eq!(my_slice.len(), 2);

    assert_eq!(my_slice[0].data.len(), 1);
    assert_eq!(my_slice[1].data.len(), 1);

    assert_eq!(my_slice[0].data.chars().nth(0), Some('0'));
    assert_eq!(my_slice[1].data.chars().nth(0), Some('1'));
}