How to use boxed functions

[noahbald]

Hey there, I'm working on integrating napi for my library, however I'm a bit confused how I can get boxed functions to work on 3.0.0-alpha.33.

#[cfg_attr(feature = "napi", napi)]
#[derive(Default, Clone, Debug)]
pub enum PrefixGenerator {
    /// A function to create a dynamic prefix
    Generator(Box<fn(PrefixGeneratorInfo) -> String>),
    /// A string to use as a prefix
    Prefix(String),
    /// No prefix
    None,
    /// Use "prefix" as prefix
    #[default]
    Default,
}

I thought maybe I could use JsFunction but it says it's deprecated and doesn't implement Debug/Clone. There's also napi::bindgen_prelude::Function but I'd rather not introduce a lifetime, and it also doesn't implement Debug/Clone.

Is there some other way I could use functions in a struct?

[noahbald]

I found there's FunctionRef and ThreadsafeFunction, I can use Arc/Rc for Clone and implement Debug to skip debugging the function.