Edit Key with toml-edit | Rust Programming Language Community | Page 1

I want to edit a key in a Toml file, and for the life of me I can't figure out how.

 let codegen = &mut toml["profile"]["server-dev"];
    if let toml_edit::Item::Table(t) = codegen {
        if t.contains_key("codegen-backend-disabled") {
            let Some((k,v)) = t.get_key_value_mut("codegen-backend-disabled");
            *k = "codegen-backend"
            // Change key
        } else if t.contains_key("codegen-backend") {
          return Ok(());
        } else {
            t["codegen-backend"] = value("cranelift");
        }
    }

This gives me these errors for the line where I try to change the key.

the size for values of type `str` cannot be known at compilation time
the trait `std::marker::Sized` is not implemented for `str`
the left-hand-side of an assignment must have a statically known size

mismatched types
expected `str`, found `&str`rustcClick for full compiler diagnostic

How do I change the key?

#Edit Key with toml-edit