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: deprecated.rs
    path of file: ./repos/phaser/phaser/vendor/unicode-bidi/src
    
    the code of the file until where you have to start completion: // Copyright 2015 The Servo Project Developers. See the
// COPYRIGHT file at the top-level directory of this distribution.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

//! This module holds deprecated assets only.

use alloc::vec::Vec;

use super::*;

/// Find the level runs within a line and return them in visual order.

    
pub fn visual_runs(line: Range<usize>, levels: &[Level]) -> Vec<LevelRun> {
    assert!(line.start <= levels.len());
    assert!(line.end <= levels.len());

    let mut runs = Vec::new();

    // Find consecutive level runs.
    let mut start = line.start;
    let mut run_level = levels[start];
    let mut min_level = run_level;
    let mut max_level = run_level;

    for (i, &new_level) in levels.iter().enumerate().take(line.end).skip(start + 1) {
        if new_level != run_level {
            // End of the previous run, start of a new one.
            runs.push(start..i);
            start = i;
            run_level = new_level;

            min_level = min(run_level, min_level);
            max_level = max(run_level, max_level);
        }
    }
    runs.push(start..line.end);

    let run_count = runs.len();

    // Re-order the odd runs.
    // <http://www.unicode.org/reports/tr9/#L2>

    // Stop at the lowest *odd* level.
    min_level = min_level.new_lowest_ge_rtl().expect("Level error");

    while max_level >= min_level {
        // Look for the start of a sequence of consecutive runs of max_level or higher.
        let mut seq_start = 0;
        while seq_start < run_count {
            if levels[runs[seq_start].start] < max_level {
                seq_start += 1;
                continue;
            }

            // Found the start of a sequence. Now find the end.
            let mut seq_end = seq_start + 1;
            while seq_end < run_count {
                if levels[runs[seq_end].start] < max_level {
                    break;
                }
                seq_end += 1;
            }

            // Reverse the runs within this sequence.
            runs[seq_start..seq_end].reverse();

            seq_start = seq_end;
        }
        max_level.lower(1).expect(
            "Lowering embedding level below zero",
        );
    }

    runs
}