pub trait BatchSpawnableLite<ReturnValue: Send + 'static, ExtraInput: Send + 'static, Alloc: BrotliAlloc + Send + 'static, U: Send + 'static + Sync>{
type JoinHandle: Joinable<ReturnValue, BrotliEncoderThreadError>;
type FinalJoinHandle: OwnedRetriever<U>;
// Required methods
fn make_spawner(&mut self, input: &mut Owned<U>) -> Self::FinalJoinHandle;
fn spawn(
&mut self,
handle: &mut Self::FinalJoinHandle,
alloc_per_thread: &mut SendAlloc<ReturnValue, ExtraInput, Alloc, Self::JoinHandle>,
index: usize,
num_threads: usize,
f: fn(_: ExtraInput, _: usize, _: usize, _: &U, _: Alloc) -> ReturnValue,
);
}