Function open_coroutine::co

pub fn co<F, P, R: 'static>(
    f: F,
    param: Option<&'static mut P>,
    stack_size: usize
) -> JoinHandlewhere
    F: FnOnce(&'static Yielder<'_, Option<&'static mut P>, (), Option<&'static mut R>>, Option<&'static mut P>) -> Option<&'static mut R> + Copy,