pub trait MutStreamingIterator {
type Item;
type Error;
fn advance(self) -> Result<State<Self>, Self::Error>;
fn get(&mut self) -> Option<&mut Self::Item>;
}
pub trait MutStreamingIterator {
type Item;
type Error;
fn advance(self) -> Result<State<Self>, Self::Error>;
fn get(&mut self) -> Option<&mut Self::Item>;
}