Rust plugins request

example_plugin : src : lib.rs

use main_app::my_mod::my_callable;

pub extern fn plugin_main() {
    my_callable();
}

main_app : src : main.rs

mod my_mod {
    pub extern fn my_callable() {
        println!("hello");
    }
}

fn main() {
    let my_plugin_main: Fn() = load_library_somehow("example_plugin").get_symbol("plugin_main") as Fn();
    my_plugin_main();
}