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: shape.rs
    path of file: ./repos/sway/swayfmt/src/formatter
    
    the code of the file until where you have to start completion: //! Associated functions and tests for handling of indentation.
use crate::{
    config::{heuristics::WidthHeuristics, manifest::Config},
    constants::{HAR
    
    fn indent_to_string_spaces() {
        let mut formatter = Formatter::default();
        formatter.shape.indent = Indent::new(12);

        // 12 spaces
        assert_eq!(
            "            ",
            formatter.shape.indent.to_string(&formatter.config).unwrap()
        );
    }