Function nvim_rs::create::async_std::new_parent

pub async fn new_parent<H>(
    handler: H
) -> (Neovim<Stdout>, JoinHandle<Result<(), Box<LoopError>>>) where
    H: Handler<Writer = Stdout>, 

This is supported on crate feature use_async-std only.

Connect to the neovim instance that spawned this process over stdin/stdout