pub trait Combinable<T> {
// Required method
fn combinations<'async_trait>(
self,
k: usize,
) -> Pin<Box<dyn Future<Output = Iter<Combinations<IntoIter<T>>>> + Send + 'async_trait>>
where Self: 'async_trait;
}pub trait Combinable<T> {
// Required method
fn combinations<'async_trait>(
self,
k: usize,
) -> Pin<Box<dyn Future<Output = Iter<Combinations<IntoIter<T>>>> + Send + 'async_trait>>
where Self: 'async_trait;
}