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: main.rs
    path of file: ./repos/argmin/examples/conjugategradient/src
    
    the code of the file until where you have to start completion: // Copyright 2018-2024 argmin developers
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://apache.org/licenses/LICENSE-2.0> or the MIT licen
    
fn run() -> Result<(), Error> {
    // Define initial parameter vector
    let init_param: Vec<f64> = vec![2.0, 1.0];

    // Define the right hand side `b` of `A * x = b`
    let b = vec![1.0, 2.0];

    // Set up operator
    let operator = MyProblem {};

    // Set up the solver
    let solver: ConjugateGradient<_, f64> = ConjugateGradient::new(b);

    // Run solver
    let res = Executor::new(operator, solver)
        .configure(|state| state.param(init_param).max_iters(2))
        .add_observer(SlogLogger::term(), ObserverMode::Always)
        .run()?;

    // Print result
    println!("{res}");
    Ok(())
}